Source for wheel arch repair panels?
 

My son has a very nice '99 Accord LX 4 door. It has developed rust around the rear wheel arch (quarter panel).

I've begun the sanding/grinding process. I see wheel arch repair panels for earlier Accords but I can't find any for this year/generation.

Anyone know a source for these?

I'd like to find these because I don't have body work experience and am not confident I can get the arch shape reconstructed nicely with fiberglass filler, etc.

In another forum a guy mentioned metals strips that are angled and are bendable that you can attach and use to rebuild the arch. Anyone seen these?

Thanks!