Howdy folks, new guy here. I'm guessing the answer to the above is no, as the Googles have yielded zilch. Looking for metal magazines, or at least ones with metal feed lips if such a beast exists.
Nope. There used to be aftermarket 35 round magazines. They have since been discontinued. They were plastic and not very reliable.
The plastic feed lips on factory mags do wear out, but it takes a few thousand rounds for that to happen. I've also had a couple that came apart at the seams. I probably could have gotten S&W to replace those, but I didn't bother. Mags were readily available and fairly cheap pre pandemic.