I've been following this conversation from the sidelines for a while now. In my opinion "butcher" and "rape" are strong words for modifying relatively cheap, very much mass produced and downright common military firearms to one's liking. Don't get me wrong, I'm the first to admit I admire well preserved and even some restored examples of historical military rifles and their significance in their time, but if a thousand or ten thousand are sporterized, it really isn't the end of the world. Or often even a bad thing.
As far supplies drying up is concerned, it's market fluctuation. Sometimes there's more supply than demand, sometimes vice versa. Cheap rifles sell, always, and quite a few people buy them for peanuts, just to forget about they have one. I'm guilty of that as well, having a bunch of surplus rifles in safes collecting dust and reflecting hopes and dreams that haven't been realized yet. If they ever will. It's just how the market works. I'd bet there's lots and lots more surplus rifles of any kind in original configuration than there are ones actually sporterized and modified like their owners planned when they impulse bought them just because they were cheap.