Need help with Onyx c8000 box!!

[lyn]

I have an Onyx C8000 8-user system with 20 Mbyte IMI voice coil drive
and a quarter inch cartridge tape(approx 10Mbytes).  The operating system
is Interactive System (Santa Monica, CA) earlier version of unix called
IS1.  About 3 week ago, it died due to power supply failure.
I took it to Onyx factory for repair and complete diagnostic.  I told them
NOT to touch the disk drive without approval from me.  Last thing I heard
from the support department (2 weeks ago) was that they 'suspect' the disk
drive was bad.  3 days ago, they told me the box was 'ready for me to pick
up'!!  After further questioning, I found that they've replaced the disk
drive, tape drive and the power supply.  Furthermore, today, I found that
their drive they replaced mine with is in different fromat than that of the
original drive I got.  In other words, my IS1 boot tape won't load and I
can't get my IS1 back (consequently, I'll loose all programs (2 years effort)
I developed on that machine with my partner). The only way I can have a
'running machine' is to buy the system III from Onyx which is not likely
to be compatible with software I developed.
I refused to pay the $1900 repair bill while looking for alternatives and
legal remification.
Is there anyone who can offer me advice and/or connect me to someone who
has such a box that I can load my software to and print it out (or load
it to my CPM box)??  I'm willing to negotiate compensation for doing it.
Please send response mail to hplabs!amdahl!lyn ....I appreciate it.

Leonard Ng