roy;
They have the door on Amazon ($30) and several other 'camper parts' places.
https://www.amazon.com/WFCO-WF-8955P.../dp/B00BFU5MBQ
I wasn't aware they moved the power station mid-year. Mine was built in March IIRC.
I replaced the front CO sensor this summer although per the "date stamp" on the unit, it should have gone another year before reaching the 5 year limit.
If you only got one years use out of the one replaced, I'd be seeking a 'free warranty replacement' from the supplier and/or mfg.
Amazon & Ebay have super great 'customer service' on defective items purchase thru them....unknown about other RV parts suppliers.