Currently, GSG makes a cheap conversion kit for around $ 250. Cheap and it works. Now the downside, don't expect it to last the lifetime of your frame. It uses a rather soft material, not sure if it is really ZAMAK (a base metal of zinc and alloy elements of aluminium, magnesium, and copper) which wears out as fast as the slide goes back and forward. Even with good lubrication, the harder frame will wear down your slide. Advantage Arms, Tactical Solutions, Kimber, Ceiner to name a few are the known kits in the 1911 market. The only problem is if you can find them here north of the border. Watch EE, you will be surprised on what might show up. And also take note, most .22 conversion kits are ammo picky.