I have no idea if they are suitable for your workbench (actually why not?) but they seem like Katsu Wood Vice...
https://www.ebay.co.uk/itm/Wood-Vice-Front-And-Tail-Hardware-7-/294152375581?mkcid=16&mkevt=1&_trksid=p2349624.m46890.l49286&mkrid=710-127635-2958-0