The second you find one, everyone and their brother will start renovating and leaving these doors all over the curbs in your area. Probably ones you like more than the one you find.

At least that's my experience whenever I buy something I've been looking for forever...

I assume you've tried Craigslist and the usual online platforms?

In my neighborhood these old houses tend to get restored to save their original character so there are a lot of nice examples what you're looking for around here... but I doubt anyone is going to remove them these days. A few houses are being worked on now I'll look next time I take the dog out and see if they have any relevant doors... have you considered if it's possible for a furniture maker to modify and existing door for you? Might be a good compromise.