I used an old set of Lyman off of a 22. Becasue they are not about to bolt up easily, I took a strip of scrap and twisted it a bit after heating in with a blow torch. The screw holes where a bit tricky because I didn't want any play. The final result is below. I would suggest you use a lot shorter piece of scrap though, this one is too easy bend and will really through off your POI.
Good luck,
Chris