Does anyone know if there are adapters made to bolt the new model 6 bolt wheels to the 5 on 5 bolt pattern trucks?

ive seen some around. might hit ebay. tell me if you find some, id like to convert my '89 to 6 lug or corvette pattern one.

On my setup I am thinking about getting some 6 lug rotors and installing 6 lug axles/brakes so I can run the newer wheels. This place has the rotors http://www.gmcpauls.com/Brakes&Steering.htm and I can get the rear from a 4x4.