This is a 'left field' thought but in my trade of lutherie, a gentleman named Jeff that operates a business named Howard's Total Vise has recently started making a large arrangement of vises and vise holding gear after some input from a fellow luthier. Now he even offers a line of lutherie vise tools.
I've spoken to him a few times and he is very intelligent and has a problem solvers mind. Considering the market we're usually left purchasing from, his pricing is exceptional. He fabricates everything in his US shop.
He may be someone to contact and see if there's something he can think of to help your efforts. His tools function perfectly, are lightweight (when needing to be) and again, the pricing is incredible compared to what we're usually left shopping for.
https://totalvise.com/
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