Nick.. If you already have the Ljutic grip.. put a bolt in it.that fits the Bowen.. and see how closely it fits.. Put the rest of the PFS on.. and see how the comb lines up.. I'd bet a half an hour with a dremel tool.. it would fit perfect.. If I could fit a Browning PFS grip to a Stevens 9478 crack barrel.. this should not be a challenge for even the most tool impaired shooter..
The bolt will get the angle with the grip and receiver lined up.. Sometimes you need to fill that hole in.. and redrill it at the correct angle.. Believe me.. it's not that hard to do.. Just go slowly.. and try to lay it out on a big flat board..to keep your stock.. and pitch at the correct angles..
This is also a wonderful time to get the grip in the right position and length for your hand.. My Seitz grip came from a cut down Ljutic grip..It fits me vastly better than the factory PFS grip.. Good luck.. Mike