I can't seem to find the threads, but more than once I've seen people asking in this forum about vibrato bars for the old Matsumoku solid-bodies that were typically branded Conrad, Lyle, Epiphone, Univox, and several private label brands including Toledo and Raven.
I just found someone selling reproduction arms for these guitars and wanted to share the information here, as they seem to be hard to get. I just bought one, so there are four left at the time of posting.....