In the AD&D players handbook, many of the spells require spell components. However, there are no rules associated with spell components. So I'm guessing it's safe to assume that this is one of the do it yourself aspects of the game. I'm wondering if anyone has a system or at least a set of guidelines regarding spell components that covers costs or actually gathering the components.
Example: the material component for Tenser's Floating Disk (pg68 PHB) is a drop of mercury. However, no rules are given on how to obtain mercury. This would seem to be an uncommon substance that should require some effort on part of the spell caster to obtain.
So basically I am looking for a way to handle spell components without resulting in a spell component pouch (such as in D&D 3.5).