Have you thought about a Protarget as they are an ambi action. You then have the choice of finding left handed EV2, Pro target or walther stocks to fit it into.
You might be as well looking for a stock first and seeing what comes up, such as the left handed GINB Steyr stock Spolie has for sale.
I hope you can keep the MPR as an HFT gun, as we need your scores for the club.
I'll even lend you a Sightron 10x42 to try if you like.