Don't know about the US, but in Australia we have a number of "boutique" - as in small shop, not expensive just because, aimed at lawyers and tech bros - local winders that obviously produce a lot less than Duncan, or even PRS, that sound every bit as good or better as those and cost less. They're not made to look different on purpose, like the PRS ones, though.Yeah, but a big part of why PRS pickups are more expensive than Duncan or DiMarzio is only because they make a lot less, and a lot of parts they use to make them (like the square bobbins) are unique to them.
PRS went down the Apple path: make it different so the user can't use, or won't want to use non-PRS parts. And charge as much as one can get away with.