Solaris OS versions supported on the cool thread series

Im trying to "leverage" (I hate that word : > ) one or more T2000's
for a customer.
The software to be installed is supported on Solaris 9 only and AFAICT
even
Solaris 9 mu8 CDs wont boot on this architecture.

I find it hard to accept that Sun would put out a box that wont run 3rd
party software.
Im not talking about compatibility here - Im sure it likely IS
compatible.
Im talking support from the 3rd party vendor which wont happen if you
dont follow their prerequisite rules to the letter.
Its always been my experience that tech support will bail on you if you
dont comply.
For production boxes this isnt an option : <

So can or will Sun supply a version of Solaris 9 that you can install
on a T2000?
And I mean soon if not now. Not several months from now : >

Thanks

.