More rust, where to find front quarter patch?

I keep sanding and keep finding holes. First the floorpans, then the rockers, now fenders and the quarters. This on a near perfect body without any outward sign of the junk below. I need the small piece on the front of the quarters (both sides), just over the rockers for my 67 FB. Anyone know where I can find these? Thanks,

Steel is no problem

It's easier if the radius and wheel lip are already there. You can't imagine how many parts I've already made for this car. Firewall-trans tunnel-fuel cell-inner fenders and tons of other body pieces. I'm lookin for the shortcut.