banks twinram

i have a "homebrewed twin turbo setup" on my 12v. ford-cummins. the clutch alredy was slipping with just a single, but now it feels like a slushbox. i dont know where to get a grabby one with the metallic or ceramic liners or go to a double disk. and what about the master-slave. how long will it last and how much is a beefed up one? the one i have new is about a year old and was hard to let go of that $350 at the dodge dealership. maybe if i get another stock one and try not to do 4th gear launches..??