Looking for a Sun 4 Ada Compiler

[simon at cs.washington.edu]

I'm part of an Image Processing project at the University of Washington,
that is using Ada on Sun 4s.  We just found out that the company that sold
us the Ada compiler that we're currently using on our Sun 4s, doesn't
support those machines.  Does anyone know of companies that sell (and
support) Ada compilers on Sun 4s?  If you could let me know by e-mail, I
would really appreciate it.