For the 25.2 problem, I found a solution from post in the BF maintenance section.
Use a 25.0 and wrap it with a cut out from a soda can. I was pretty shocked
to find that you can cut a soda can with paper scissors and yet it made the
fit!
24.2, I've looked a great deal and haven't ever seen one. Perhaps a 22.2 with
a 1 mm wrap.