The new barrel arrived today, I'll post a range report Saturday night or Sunday AM.
First impressions - the replacement barrel was shipped quickly (just ordered it Monday!) and packaged well. No dents/dings/etc. It was supplied with an Allen L-wrench to remove the hinge pin and old barrels, and install the new barrels. Installation literally took 30 seconds, and the new barrels fit just as nicely as the old barrels did.
Loaded factory "UltraMax" 44-40 drop into the chambers nicely, and the barrels close without an issue. The gun seems an ounce or so lighter, probably due to less steel in the barrels themselves.
I've attached a few pictures as well.