If you want an historical opponent that could conceivably be re-engaged in conflict, think about the Vietnamese.
The modern VPA is switching to the STV-380 which is a Galil derivative/ AKM mashup. The naval infantry have Tavors. That said, there are heaps of AKs still floating around so simple head swaps of PASGT style helmets to any existing NVA range and you would have reasonable proxies once painted in camo paint. The VPA uses both plastic PASGT hard hats and ballistic PASGT copies.
Alternatively there are the ex Dadi i Piombi/Venexia now Jerwood range of modern Italians. The rifles look very similar to the STV once you have cut off the carrying handle (I've used some as Galil clones). These figures have separate heads so even easier to convert. They do come with body armour which is still relatively uncommon with the VPA but they have introduced it and are rolling it out.
Other options might be a mash up of the Rubicon figures with the WLG (ex WF) special forces in the now defunct Zombie range. IIRC they had a clearance sale on these not long ago. None will be perfect but I suppose that's going to be the same deal with ROKA.