I get that, but help us out. What kind of wheels are you trying to put on it?
Torque thrusts? Slots? Magnums? Salt flats? Centerlines? Keystone? Weld wheels?
You can have ideal dimensions, and maximum tire width for the space available, but if the wheels you want don't match the ideal, then you will have to find out how much compromise is in order......
15x8 torque thrust one piece is probably around $150. A CUSTOM bs two piece 15x8 torque thrust is about $600.