Lindsey and I just left Ford's (we're grabbing sushi at the boardinghouse right now) and I'm happy to report the stirrups have been fixed. I was told by the Ford's Society Exhibition curator that this had been fixed a couple months ago. Since we were in DC, we went in and checked. I'll post a picture when we get home.
It's going to take more to convince them of NPS' mistake regarding the knife, map, and keys.