[Elecraft] clifton laboratories Z10000 still available?

[Wayne, W5XD]

I want to build a SoftRock panadapter for my K2, and understand from
http://www.cliftonlaboratories.com/k2_interface.htm its advisable to put
an amplifier between the K2 IF tap and the SoftRock, and its their
Z10000 recommended.

But I don't get any answers to emails to the address on that page.
Does anyone know how to get a Z10000 or equivalent for the K2?

My apologies if everyone on this list has seen the answers before--I
tried searching archives, but failed to anything on
http://mailman.qth.net/ that enabled searching this list...other than
clicking on every single posting in the archive...which I did not
do...If you know how to search, tell me that, too.

Thanks,
Wayne, W5XD