I have found this swing-away tire carrier:
HG Series - TireGate.comTireGate.com
However the horizontal bar that is parallel with the bumper that stays in place when the tire is swung open prohibits the doors from opening.
There is a solution by using a 2" hi-low drop hitch like this:
2in High Low Drop Hitch-pplmotorhomes.com
I talked to Roadmaster that makes this drop hitch and they said it would work for what I want to use it for.
Now the problem might be that the lowest horizontal bar on the swing-away might be too low to the ground. I have not talked to the manufacturer (Tiregate) about this, guess I should.
I have talked to Tiregate and they are looking into making one for the Promaster since they are getting requests for it.
I am thinking about calling Roadtrek and seeing what they are using for a tire carrier on the new Zion that is on the Promaster chassis.
In the mean while, I have purchased the Safety Seal tire repair kit, and purchased Coach Net Tire Replacement Policy.
If you find anything about the above, please let me know.