I forgot you had that other box. If it has steel shift forks you can use those. I have broke those brass ones several times.
EDIT: I went and looked through your pics again and that is what they look like after using ATF in a gear box. Don't want to jack the thread, but beware of that. All that metal transfer and all that. It it possible it was run low on lube as well. The end result is usually the same.