Check over on Weaponeer, they usually have a lot of conversion info on the various kits. Not much on the PPS43 yet, but I'm sure it will show up eventually. The lower is quite small vertically so I would think a striker fired system would be used instead of mounting a hammer type FCG. The sear and trigger mech is FA only, so that will have to be modified with a disconnector.
Another hurdle is receiver blueprints, haven't seen any yet. The trunnion will have to be fabricated also. The receiver itself looks like you just bend some sheet over a round bar, probably loking at a blocking bar to exclude the FA bolt.