Ye Olde Inn

I'm not sure where I got them from (possible a Kellar's Keep or lot from eBay), but I'm in possession of a couple of doors which have the gold plated door on one side and the iron door on the other side.

I'm considering making a quest using those doors as a game mechanic, but I kinda want to know if these doors are common and everyone have them, or they are rare and I just got "lucky".

I have one too. Almost certain it was a UK kellar's keep of ebay.

Did it come with one or two of those doors?

Well, I only have one now. Got my KK and RoWL at the same time and didn't pay much attention to details.
I may have had more than 2 and cut 2 them in half and glued the correct parts together. Can't be sure though, it was some time ago.
I now have 2 wooden ones glued, 2 metal ones glued, and the undecided one.