One of the problems with getting non-standard equipment is having to look for non-standard replacement parts. I've used the brakes so much that Matilda (Walker Matilda) has virtually no tread on her left rear wheel and the right rear wheel is also showing significant wear.
Duke McMillen told us about a place near the Wonder Bread Outlet store that has always supplied him with any size and type of wheel he's needed. We tried to find out today but the company is off until after the New Year. So many companies take that time off that some people have even started to think that the whole week is a holiday. No, folks only New Year's and Christmas are close to being universally recognized as official holidays.
Fortunately, I have a spare walker to get by on until next week.