Yugo and type 3 style RSBs are like 1.5 mm wider than the AKM AK74 RSB. So the lever, too, is 1.5mm wider. I suppose it is possible to make one work with a little filing.
RTG has east german and polish AKM levers in stock right now. https://www.robertrtg.com/store/pc/A...AN-35p1664.htm