I haven't asked but, like you said, I don't think RA is making/has any of the type 1s.
Not exactly sure about the type 2. I didn't annotate the xcrs that I've seen. I was thinking it might be a little higher but that's just a WAG. Externally, you can tell by the extra material removed from the carrier. "Most" of the used xcrs I've seen on GB are type 1.
My first XCR was 38XX. They started offering the updated trigger and ambi safety as standard shortly after I got mine.
With the various configurations/ options it's hard to nail down the transitions.
What config are you looking for?