Now available is a repop of the '60-'66 Chevy fleetside rear wheel tubs. Previously the '67-'72 rear wheel tubs were being sold as a replacement for the '60-'66, but there were not close.
I met the owner of Bowtie Bits (
www.bowtiebits.com) a few weeks ago and he informed me the correct '60-'66 wheel tubs were available in both fiberglass and steel.