I see what you mean about them being hard to find! I've looked through just about all the sites I know of and found nothing.
Just a thought here... perhaps there are other bushings that can be swapped (i.e. Civic bushings) that are more easily obtainable. I didn't spend enough time in Germany to deal with the Honda dealers there, but they should know that kind of thing (or at least be able to give you the dimensions if you don't already have them).
BTW, nice to hear from another soldier on here I just finished my TOD eight months ago after a year in Iraq (LSA Anaconda).