AIM is vendor located in Monroe OH, very near where the old SOG (Southern Ohio Gun) wholesaler was. I spend some time up there. https://aimsurplus.com/
Great tip, see they are back open for walk ins. I will do this while in town for the great Meat.22 is the same size frame as a Glock 17 (9MM) but the 22 is in 40 S&W. First Glock I ever bought was a new 22 in 1991 and shot thousands of rounds through it without any problems.
First thing I would do when it arrives is take it for a visit to the Armorers in Smyrna. They will fully inspect it and replace any parts that are worn out at no cost. If you want to replace the night sights with some new ones, they will do it for less than $50. Take the box and mags with it as they will usually swap out the mags with the most recent generation of mags.