Best corners?

[Trip59]

Ok, so... Uncle Sam is sending me some money soon, which means a round of orders in the near future.

I need cab corners, inner rockers, front fender corners, kick panels.

Believe it or not, the cab supports are rock solid!

I know there are some good ones, and some thin/less than accurate size/etc. ones out there, how do I pick?

On a related note... what does everyone use for the back side/undercoating and is there something I can shoot down the pillars to convert the rust and seal them up where I can't sandblast or grind?

Trip