A company called Bowtie Bits (
www.bowtiebits.com) sells fiberglass rear fleetside tubs, cast from the originals, that are factory correct (except they are fiberglass) for the '60-'66 Chevy fleetside beds. The underside is coated with a material to resist rock chips. I met the owner of Bowtie Bits in Wichita, KS at the Sunflower Swap Meet last Friday and he was telling me about them and showed them to me in their new catalog. I believe they went for $110.00 each, plus shipping.
The owner also told me the swb and lwb fleetside bedsides will be on the market within a year...I have heard this before, but he seemed pretty confident this was going to happen. I am interested to see the quality, fit and finish when they come out.