Check out these nos GMC caps.
http://www.ebay.com/itm/1964-1965-GM...e654f4&vxp=mtr They are very nice, but be careful. These are not 3/4 ton 8 lug hubcaps like seller claims. They are not for 1/2 ton 6 lug with regular bump type wheels either.THey are for clip style 1/2 ton 6 lug rims, but agian watch out, must be a 6 lug clip rim with sharp drop off around lug center like the green rim in my post # 67, won't fit 40's to mid 50's wheels 6 lug rims with clips with the broad wide shallow drop off around lug center.