I'm searching for a Atwood 10 gallon RV water heater

I'm looking for a good used 10 gallon Atwood RV water heater from the 90s era.
Both gas and electric.
Could be newer or older.
Just wanting to replace the leaking one I have, to fit the same size opening.
The model number I have is "gch10a-2e" from mid 90s fifth wheel RV.
If you have an older RV you're parting out with a good working water heater please reply with some details of the one you have.
Asking price, Model number, approximate year or at least the measurements for the hole it fits into.
A picture or two would be very helpful.
I am able to remove it from the RV if you can't.
The sooner, the better.
I live in my RV and currently have no hot water without using the stove to heat it and I'm too old for cold showers this time of year! If this ad is up, I'm still looking for one.
Thanks for reading