I own a 1972 240Z and need a center cap for the original polished mag slotted wheels. I only need one but would buy 4 if necessary. The caps are held in place with four small bolts which need an allen wrench to tighten. Any ideas where to fine these caps?

Here:

http://www.ebay.com/itm/4-CENTER-CAPS-FOR-INDY-WHEELS-US-MAG-4-EAR-4-LUGS-LUG-2-1-2-SCREW-HOLE-SPACING-/200741509261?pt=Motors_Car_Truck_Parts_Accessories&hash=item2ebd20588d&vxp=mtr#ht_1592wt_1270

Chase