4506 mags might work in a 1006, the mag-wells must be close to the same, as aftermarket grips work on both in my experience. I've used Sig 220 - .45 mags in my 220 10mm with out any issues, in fact they work better than the 10mm mags in that you don't need to depress the mag release to insert them. Probably easier to find 4506 mags.
on further research, it seems they won't work in a 1006. Too bad this is the case.