I agree, the Ronin Arts 101s are very good, and those two would be particularly useful for this. However, I like 101 Mundane Treasures (and Another 100MT) most of all, I think. . . FWIW.
Spells & Spellcraft has a section in one chapter called "Magical Materials", which is rather handy, if you're looking to do this kind of thing.
The Advanced Gamemaster's Guide has rules for "Levin", which can be used in place of XP for magic item creation, or in spellcasting.
Some of the monsters in Denizens of Avadnu have a 'Physiological Uses' entry. Plus, it's a great book anyway, though overlooked (most likely due to a lack of marketing, AFAIK).
Unearthed Arcana has rules for Metamagic Components, some of which are from monsters. These rules can also be found
here. Not sure how much use that'd be, but hey. Another thing to look at, and free if you prefer.
