Hi, it says on the housing Del Mar Eng. PAT 3 670 357 The wheels definitely need replacing because they're square now, but I'm happy to buy the entire thing Thank You!!!
Bob from SWISCO responded:
December 2, 2020
See our 81-093 Roller. The Screw Tab isn't straight like your old one, but I think it still could work. Just go over the dimensions to make sure everything otherwise matches.