They have been gone for at least 15 yrs now, I would guess. I bought one new in .32acp at least 20 yrs ago. Don't think it came with a manual. It actually works quite well once you find out what ammo it likes to eat.

I can tell you how to field strip it if you'd like.  Take gun in left hand so the right side of the gun is facing you. There will be a slotted screw on the frame in front of the trigger pivot pin. Take a small screwdriver, push in and turn to the right, grip slide, pull to rear, and lift the rear of slide up and off at the back of the stroke, going forward again.
Re-assembly is opposite. The only thing you have to watch for is a little flat spring that works the ejector/slide stop.

Hope this helps, sorry I don't have more info.

PS, I think Forrest inc (Yes, I know) is about the only place you can find mags.