I'll save you the dime, Gary
I've done a couple of this type conversion, and it works out just fine. Since it's a pain to perfectly fit two slides to the same frame, frame/slide fit is usually done for the .45 top end, and the best possible fit thereafter for the .22. As far as a match barrel for the .22, I'm not aware of one, but setting up the floating chamber correctly and putting a good crown on a factory barrel usually results in a gun that shoots way better than I can.
For real accuracy, you might want to consider the Marvel .22 unit. The last one we did was absolutely scary accurate. I've got .22 rifles that don't shoot as well! It's aluminum, but nicely polished and black anodized, it's really attractive. We make add-on top rails that can accept any sights, too - so youe not stuck with the Bo-Mar copy.
I hope the info helps - you can still call if you like!
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