Asteroid Prospecting and Mining - rule book, supplement, whatever?

[terranstrider]

Does anyone know of a RPG rule book, supplement or adventure that includes rules for finding, mining and selling valuables from asteroids and or comets?
I'm after rules for the chance of finding something valuable; what it takes to mine it - time, cost, equipment; how to sell it and how much it is worth.
I have read the information in GURPS Space, GURPS Transhuman Space The Deep Beyond, GURPS Spaceships 6 - Mining and Industrial Spacecraft and the GURPS Basic rule books. There are plenty of guidelines but no specifics for gaming asteroid mining.
Space Campaign Parameters: TL 10^, Wormhole Jump Drives, Artificial Gravity, no nano-technology. Players can access a mining ship 3,000 tons, 2g/c manouver drives, with mining module, ore & volatile processing modules and the ability to tow external cargo modules (if leased).

Some rules with tables for % chances, random events, hazards, bonanzas, etc. would be a big help.