I think that design of the Wiseco piston needs to be changed for the LT500.  Wiseco want about 8000.00 to make a forging die to my specifications. There is additional cost for programming and machining different skirt profiles from the handful of what they call there standard profiles.  I would probably need to charge 300.00 or more for a piston to help recover special programming and tooling cost due to the small number of pistons produced. 

Have you contacted JE pistons here in Huntington Beach they do a lot of aluminum pistons ( I can buy there screw ups from the local metal recycler around the corner)?