Brandon,
Colaws will take the door back I have used them before good folks.
That said have a local sheemetal HVAC shop make it for you. I have made several of these doors. Hard part is getting the aluminum and if you will send me a note to This email address is being protected from spambots. You need JavaScript enabled to view it. I will get the sheet for you. It is not expensive at all I can explain how to have them bend it if you lay it out on the sheet. You can also have Beaver coaches in Bend make it for you new for the price V was going to sell it to you. Lastly do you have the old door? Should be able to make it for under the 300 bucks Call Arizona RV Salvage in Phoenix Where are you Bill