Dear 717-113
Exactly how many different vendors are you looking for?
I would imagine that only Mercedes themselves and K&K actually stamp out body and repair panels for a W113; so with the same sources you're chasing around what?
When one poses a quesion like "are there any xxx BESIDES" that indicates to me an issue--like the parts don't exist or the vendors are uncooperative. You won't find that with K&K or Bud's. Bud's is a reseller; K&K is a manufacturer--yes they own the stamping presses.
You simply won't do any better on sheet metal than K&K. The material they use is actually better than OEM; it's thicker gauge, and usually galvalume.
For what its worth: if you are American, you care about American manufacturing, or both--K&K's goods are mostly made in the USA. They do have some complex parts made overseas but they make tooling and stampings right here in the USA, too. I for one support this when I can. All of the sheet metal used in my restoration came from K&K. You can call them and talk to them if you have any questions, too. They are pretty friendly.
Michael Salemi
1969 280SL
Signal Red 568G w/Black Leather (Restored)
President, International Stars Section
Mercedes-Benz Club of America