As Vintage Bug said, I used a pair of Klassic Fab heater channels on my Oval, and they were a superb fit. They're much heavier than the standard repro units. I'm not sure if they make heater channels to fit your '65, but if they do, it might be worth your while ordering them directly from the manufacturer. There's also a firm in Holland, (Evam Classics) who are an agent for Klassic Fab, and their service is pretty good.
Klassic Fab also do the lower bulkhead repair section, but again it's worth checking to see if they do one suitable for your car. Have a look on some of the VW websites as 'body cuts' come up for sale, and as original panels, they're sure to fit. Just make sure you have them thoroughly blasted first.
Autocraft Engineering do pretty good panels too, but in the end you pays your money, and you takes your choice!
Good luck!
Gavin.