I found one in Marion of all places. Little high at $425 OTD but hey it's new. The Riton red dot that's on sale fits perfectly.
Started out a little rocky because I figured "how hard is it to load a .22 mag?" and got multiple malfunctions. See, because it's a double stack mag there is a lot of room for rounds to get crossed up or out of line and the results are stove pipes, rounds dipping down in the mags while cycling and for some reason misfires.
I now know that you have to just take the tension off the mag spring enough to slide the next round in. You can't just pull the spring back and drop them in.
I haven't had a single issue since I figured it out and it's as accurate as I am.
Also I was a bit bummed that the profile didn't fit other Sig pistols and would take a proprietary holster but today I found out that it fits perfectly in my S&W M&P holster. All in all I am very pleased.
@wvsig If you wan't to try it out send me a DM.