Hi Jon,
We do not have any such machine that I know of,
so you would probably have to build it yourself.
That would probably including doing the complete
fink install (if it is still available for such a system)
with openmotif. See:
http://afni.nimh.nih.gov/pub/dist/HOWTO/howto/ht00_inst/html/mac_10.6.html
- rick