Classic is now offering patch panels for early A's 63-65...Prices are only a couple bucks more than Layson's, but you can get free shipping through Classic. I just ordered the wheel well patch, $5 more, but free shipping cross country...I bought the rear qtr. patch panels from Layson's a while back so I can compare quality and let you know http://www.classicindustries.com/shop/1965/mopar/parts/body-panels/rear-quarter/patch-panels/
website kinda sucks, here is the money shot https://www.classicindustries.com/product/all-years/plymouth/all-models/parts/mp41239.html
Autobody Specialties has better looking and better fit. 63-66 DODGE CARS - DART - 1963-1966 - Auto Body Specialties
I did the ABS metal replacement of the wheel arch and the rear lower quarter, fit and finish was better than I expected and everything tied in nice. (and front floor pans) I just did a fender (front left) patch on a friends car from classic,,,meh it's okay, I had to "massage it more than I lied to get it to fit the back metal pieces and look right on his car.
They don't have it for the Valiant/Barracuda though. At least it's not on their site. Are the outer wheel houses the same between them?
I didn't either....but I wasn't sure. It's funny how different they actually are. The Mopars are not like the GM cars. Take the Nova and Ventura. For 72, nearly all the sheet metal is the same.....possibly with the exception of the front and rear sheet metal for differences in the headlight area and tail light panel. Although the Mopars are similar in that respect, a lot of the sheet metal in other places on the cars is different between Dodge and Plymouth. You got "more of a different car" with Mopar.
I never had a reason to look at their Valiant/ Barracuda parts. Interesting they don't carry those patch panels. Those panels fit pretty good.