I purchased a lower patch panel for my 1970 right fender from www.oldmusclecars.com I haven't installed it yet.
The good thing about it is that the steel is very thick, and it's less expensive than a new fender.
The bad thing about it is it looks like I'll have to do some creative hammering and fabrication. It doesn't follow the curve of the fender that well, and the body line is rounder than the original fender.
This company has good prices and an informative catolog with a few illustrations. If I remember correctly, the catalog was about five dollars. If you have time, you can download it for free from their site.
I go to Lutty's chevy (Pittsburgh, PA area) which is a local distributor for Good mark panels. If you can find a local Good mark distributor you can save a bundle due to the shipping cost of most of the panels.
Hey Guys, I have replaced door skins qtr. panls. floor pans and trnk floor, and patches fabed from sheet metal, most of the panls came from keystone automotive in cleveland and was delivered to house. and a dr.skin came from Summit raceing parts when I saw my '69 nova for sale and I could get it for $250.oo and having a garage and 10yrs of bodywork
aw what the heck it's a good hobby to restore a classic,good luck
I've been working on mine for 10 yrs. and will be at the car shows next summer I'm on the interior now the panel were around $300 not bad.
if you can weld them in youself.