For those hard to get spells I'd suggest just becoming friends with a researcher on your server.
For research first you need some type of "dirty" scroll. These scrolls come in level groups of 5 and are global drops off mobs in that level range. For example the level 50-55 scrolls are just called "spell scroll", and for each level they have a different prefix:
50: Grubby crude spell scroll
51: Shabby rough spell scroll
52: Grimy spell scroll
53: Shabby fine spell scroll
54: Dirty runic spell scroll
55: Stained fine runic spell scroll
Note the pattern. First word is some type of flaw with the scroll, second word (or two words in the case of the 55, and none for the mid-range 52 one) gives an indication of the qualtiy, and then the last words give the tier. This pattern pretty much holds for all research scrolls above 50 (usually there are only 5 scrolls per tier, from rough to fine runic) with "spell scroll" being replaced by the scroll type for the tier (vellum, parchment, paper, etc).
There's not really a need to know this progression since if you inspect the scroll it gives a recommended level, which is the same as the level of the spell that scroll can be used to make. However once you learn it you can immediately identify the level of the spell without needing to inspect the scroll. Also note that for spells available to multiple classes, such as our malo line, you'll need the scroll corresponding to the lowest level class that can use the spell. So if shammies get the spell at 52 and we get it at 53 you will need the 52 scroll to make the spell.
These scrolls drop from caster mobs of the appropriate level range, so any level 50-55 caster mob has a chance to drop any of these above scrolls (a 51 mob, for example, can drop a 54 scroll). Once you have some of these they need to be repaired through research and don't have a very high trivial (53 in the case of the fine runic spell scroll). With a little effort/pp you can probably attain this yourself and not have to bug a more experienced researcher to do it for you (just make celestial cleansers until you have a skill of 54, and save a few since you'll need them to repair the scroll). To repair a scroll you'll need the appropriate scroll solution, which you can either buy (more expensive) or make yourself (cheaper but chance of failure, though again, at 54 skill these are trivial and you'll only have a 5% failure rate). Combine the solution, damaged scroll, and celestial cleanser to create the repaired scroll. Repaired scrolls have the same name as their damaged counterparts, but without the first word. So a grubby crude spell scroll becomes a crude spell scroll. The solution names are the same as the final scroll names, but with "solution" on the end (crude spell scroll solution).
You then have the choice of either trying to raise your skill further and then attempting the combines yourself (considerably higher trivial, in the 150s), or find a friendly researcher who will make the spells for you. The cost to do the combines (not counting what you already spent to repair the scroll) will probably be in the 25-50pp range, assuming you don't make your own inks and whatnot. I do recommend learning research, as it's not only helpful for getting your own spells up through level 75, but it can be quite profitable as well to make hard to find/quested/faction needed spells and sell them. If you do decide to continue in the research profession, be sure to both: 1 - get your research trophy asap, since the higher your skill when you get it the harder the materials are to find and the more expensive the combines are, and 2 - Save all binding powders you find. Binding powders are the cheapest way to raise your skill, especially at higher skill levels.
For more info, such as individual spell recipes, visit
www.eqtraders.com