Patch panels, which are the most accurate?

[Improbcat]

I'm going to need to do patching on the '64, and was wondering which company's panels are most accurate for the following:

-DR side rocker panel & outer floor(I need the whole rocker & the top up to the riser for the seat.
-rear bottoms for front fenders.
-front hood edge.
-fleetside bed around wheelwell.

I also am going to be fabricating a lot of other less complex patches, and was wondering if people knew what gauge the sheetmetal on these trucks are. I'm going to be fixing the inner fenders, outer fenders, door skins, tailgate & possibly radiator support.

Thanks in advance!