I'm looking at a reference to the brand "TX Peripherals". A link to
their website just brings up the Tapes4u, so I suspect they're out of
business.
The Wayback machine shows a few pages. It looks as if their 9-track
setup used a rebadged Cipher drive, but that's about all I can tell
about them.
Did they use Pertec-interfaced 9 track drives?
Thanks,
Chuck