Nickel was the unmentioned alternative to the plating shop but I did want to make sure there were some good DIY experiences with it.
These are my Nickel plated bus bars:
I imagine that the tinned copper braid would work just as well? Should do fine. Would a cheaper hydraulic vise(6-ton) do the trick? You won't get a cold weld, but the connection should still be fine. I've used them in the past.