Denso may have made these in Japan when new. They may have even made extra, to supply parts, for a while.
They could have moved their tooling to China or Thailand. They're still running the show, and still making quality parts.
I would buy what's most guaranteed to fit-- Denso brand first, your mechanic's favorite second. Any cobbling you'd be doing, and it sounds like quite a bit, will reduce the reliability of the Denso part to a point lower than whatever generic or used part you can source.
I wouldn't fiddle around with switching pulleys or hoping that with/ without power steering matters. For all we know the compressor uses the PS pump's bolt pattern unless there's PS, then is sits somewhere completely different with a different bolt pattern.
BITOG is a US-central site. We can help, but only so much.
