Yes it is two adapters that bolt together. I was looking at a company called Motech (not that motech) that actually makes them to order out of Las Vegas for a reasonable price. Being they are custom you have quite a few options.
I am selling the PR44 because I was at the same spot you were. Build around a mild but stout 37" or go full retard with 40s. I went with the PR60/80 combo and unfortunately the bleeding probably won't stop there.
IMHO, a PR80 is too much for 37s. Ran it one trip in that combo and the ring gear is so big it just caught every rock.