well, if one has a Glock or a 1911 handy:
http://www.mechtechsys.com/index.phparound 5lbs less optics & accessories. Calibers up to 10mm auto. Takes Glock or 1911 mags, depending on model.
YMMV, 'cuz I don't know if they actually work, or not. I can vouch that the Kel-Tec Sub2000's are not so hot.