Probably a question for your Dealer, but if you are in a pinch those are pretty common regulators (either one) and any RV Dealer should be able to get you fixed up. You don't necessarily have to go with that one, you can go to any of the versions (Marshall Brass, etc.).
Brad & Dory - Lone Tree, CO
CURRENT - 2013 Itasca Meridian 42E/2013 Wrangler 4dr Sahara
SOLD - 2014 Redwood 36RL/2014 F350 DRW