Source for uPC1237 Protection IC for a Stereo Amp, 8-pin SIP?

Made by NEC in late 80s to early 90s. 8-pin SIP. Does anyone still make these or an equivalent part?

Part that I have is marked C1237HA China 0220BB10.

There may be some to be found floating around in antique or gray market channels, but I’d doubt the prospects for current production; discrete linear amplifiers have become largely obsolescent, and that’s a fairly purpose-specific IC in a relatively disfavored package format.

Thanks, Rick. All true, but I just need a couple to repair an amp. I’ll check eBay, Aliexpress and other likely places.