WANTED - alloy wheel cap centres - HELP

I am after a supplier I can contact & buy 4 or 8 even 12 alloy wheel cap centres,
They have to fit over a lip on the existing alloy wheel,so the inside diameter of the cap must be 77mm,
They are to fit onto the yesteryear superltes or minilites with the steel rim and alloy centre,
I don't know if they use to slip through the hole from the inside or not but I may have to drill screw holes to retain new ones if I can buy them

Jim 0245773011