Hello Gregory,
I don’t know if you’ll find any one resource for model clamps that will fulfill all your modelling needs. Hobby stores have many variations of clamps and sometimes it’s a matter of trial and error to see what works for a particular purpose. Many times you don’t need to buy those expensive clamps to meet your requirements, you can make them.
I have a box full of various clamps from the simplistic elastic band to the Berna type plastic pressure clamp and many others in between. I even use small velcro pieces that came something I found years ago. The ones I find most useful are the old fashioned wooden laundry pegs, inverted paper clips and long nose plastic clamps. The wonderful thing about those cheap wood laundry pegs is you can cut and carve the ends to shape for the job in hand. Being soft wood they provide mild pressure preventing marring of the wood model pieces.
I’ll attach a photo of just a few of the clamps I use to give you some ideas. My most used and versatile one is simply finger pressure
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