Try e-gunparts.com
25-50 USD
The one that came with it
Try gun shops, gun shows, want ads.
100 USD
It should be marked on the slide. 22LR (.22 Long Rifle)
Want ads, gun shops, gun shows, e-gunparts.com
Lorcin L22s are junk. The build quality is inconsistent to the point where the ideal ammo for one gun may be problematic for another. You'll have to experiment with various types of ammo to find the ideal type for your pistol. Remington Subsonic may be a good place to start.
The Lorcin is a low cost handgun. Their reputation for durability, reliability is not extremely high, but I know of no specific safety issues with them.
Lorcin
It was made by Lorcin, and Lorcin is no longer in business.
Lorcin manufactured them. They are now out of business.