One more resource you might want to check is your local Buy Nothing or Everything is Free page. Half the houses in my current town were built before the depression by a small handful of contractors, and all of them use the same weird nonstandard doors. Whenever someone remodels people try to get the old doors because they’re as good as gold around here. Point is, if you ask around on there, you may find that someone has a stack of wooden doors you can have for free just taking up space in a garage or shed. And if they do, and you want advice on refinishing them, 100% hit me up