Yep, go to Gearbox. Their phone number is (480) 345-3575. The price will mos likely be south of $160 for a good replica (not to say it can't be up to $200).
If you're only going to be using it to dry fire, you might as well pick up a propane adapter (usually about $20-$30). That way, you can get gas at almost any store, and you save cash in the long run.