Spydermonkey· Occupy NYF JBT Tank Operator
They do exist but will fetch more than $100ea. Keep your eyes on GT and ARFCOM classifieds for them when they turn up once in a blue moon.
I have neither seen nor heard of a Glock mag wearing out either in person or on the internet. U-notch NFML have been known to crack along the witness holes on the back but it's fairly rare.Particularly if it's that expensive, make sure the mag catch slot is in good shape. Glock mags will wear out after enough use, unlike metal mags.