I don’t know, but I would look for it in Amsterdam first. At least I was there 30 years ago with my girlfriend at the Sex Museum. Penis AND vagina museum combined, what more could you ask for?
Cynthia Plaster Caster has also cast women’s breasts, and has said, not surprisingly, that she’s never had a “failure” in that department.
This reminds me of my Biology I & II days, when we learned that people are pretty much the only mammals that do not have a designated penis bone, and in the practical exams, that was one anatomical specimen that everyone identified correctly.
Well, there’s this.
Not a museum as such but the Museum of Modern Art in Tasmania, Australia is famous for having a wall comprising entirely plaster casts of vulvas.
I won’t link to it but if you search “Great Wall of Vaginas” you’ll find it.
Just walk through those curtains. You’re looking for a little man in a boat. If you get to a fork in the road, you’ve gone too far.
There is. I’ve mentioned it before on these Boards
There’s also The Dinner Party, which I saw on when it originally toured.

I think it’s going to be a stiff challenge to top that one. But posters are coming this way to do just that. Gotta hand it to 'em; where there’s desire, there’s results.
Don’t let it go to your head.
That’s pretty tame compared to the exhibit by the same artist called “The Spice Of Life.” Check that one out for yourself (and yes, it’s NSFW&C).

Perhaps the plaster caster lady’s estate will donate.
According to Wikipedia Ms. Albritton had already donated her cast of Jimi Hendrix to the Icelandic penis museum.
I was also sad to find out she passed away earlier this year. My spouse knew her (no, he was not one of her subjects) so her death is more meaningful to me than that of a lot of better known people.
Another famous band groupie Sweet Sweet Connie died last year. Connie Hamzy lived in my city, Little Rock. She occasionally made the local news for fines and legal stuff. Nothing bad.
It’s a strong reminder of how quickly our lives are passing by.
Well I guess I stand corrected. I still think I’ll stick with the Museum of Fine Arts.

There’s also The Dinner Party , which I saw on when it originally toured.
True, but that’s an art exhibit, not a museum.
I mentioned it in my book because one of the settings is called “Medusa”
The stepmother of the title character in the British dark comedy Fleabag is a sculptor who, among other things, makes casts of men’s schlongs.
At one of her shows, she has a wall-full of them on display. The sculptor playfully asks her stepdaughter if she recognizes her father’s among them all and is somewhat disconcerted when she instantly, and correctly, points it out.