I can’t help with the vise but I can help to keep this thread going with treasures I find. I visited the scrap yard yesterday and today, came home with over 2000 pounds, mostly 2 and 3 inch square tubing. I have three buildings full from one scrap yard over the last twenty years.
Scrap yards can be a very significant resource for those who have access and are willing to put in time. Nearly everything I build in the shop is made entirely from scrap and processed with hand tools, power tools, machines and machine tooling all had from the scrap yard.