An absence I've noted for my current campaign is the mixture of inks for the manufacture of scrolls.
After a little brainstorming and scribbling I came up with a simple means to generate the recipes for the inks required to scribe scrolls: random charts; well, they are random here but a few spells have logical collections of inks on my own notes.
Each scroll requires 1 special ink ingredient per spell level. Roll once on each table per ingredient.
Ink Ingredient Source
Ink Ingredient Form
Value suggestion multiply the rolls on each table and multiply by the proper amount for you campaign economy. In Mog it's going to be x1d6 Gold Dragons per ingredient, in other campaigns I'd probably go with x10 or x100 GP, maybe modifying per level. For Mog I've got no fixed price for scroll creation in others the value of the inks would likely count towards the codified expense.
Of course the ink doesn't get on a scroll by itself yuo have to inscribe those scrolls with special plumes.