Which bit are you trying to repair?
Jaymic (UK) have some repair sections for the bottom of the front wings and from the B-pillar back to the rear wheel arch, but they often need a lot of work to get them to fit.
Their pattern rockers (sills) are not that good I did buy some but went with genuine parts from Wolloth and Nesch in the end.
Sometimes you find you need to make your own. a "sand bag" and a set of panel beater's hammers and dollies is the only way to go.
Finally if the outer sills need patching, because of rust, you will probably find a horror behind I'm afraid... I have
Malc
