I am seeking  findings that are gold filled or gold or silver.  The clasps would not be toggle but snap in and the like.  Thank you.

 Many findings  such as toggles are cast. Gold filled toggles are scarce because you can't cast in GF.

"High end simple findings" is a pretty broad category. Let me see if I can make some broad suggstions.

My business (Rings & Things) has some classic sterling clasps that work well with high end designs. Some of the sterling "puzzle clasps" and Thai Karen styles come to mind. Some of the Thai beads were recently featured on a BeadStyle magazine cover.

Other places noted for having better quality, sterling, GF and gold findings (in no particular order) include:
Halstead Bead
Rio Grande Jewelery's Supply
Joseph P Stachura Co
Monsterslayer
Chris's Cables
Tarak High Karat Gold
Rishishay
Shiana.com
Stuller Settings (gold particularly)

If you can be more specific about particular findings you seek some of us might be able to  give more specific answers.

Snap clasps (a/k/a button clasps) are made in sterling but I can't remember who carries them. Rings & Things has plated ones.

try www.silverior.com

Hope you will find something suitable for you

 I'd like to add  Nina Designs, Saki Silver and Under One Sun to to my list of better quality silver findings. All 3 of them produce unique quality goods. These companies design goods for the US market and have them produced in Asia.