Looking through IDS documentation and I'm not clear on something. The manual mentions that a PRI card won't work in an 84 port cabinet and an ACPU is required in cabinets that do support PRI, but other parts of the documentation only reference installing PRI in a 228 cabinet.

Does the PRI card work in a 108 with an ACPU?

Yes you can install PRI in 108 cabinet See section 500 2.1.3 108, 228, 432 and 648 Port Configurations

Good to know. Thanks!

Don't suppose you'd have a source for a PRI clocking cable would you?

No don't have that but see you can purchase card with the cable from various vendors (Google)

Try calling Georgia Wire 1795 Corn Rd.
Smyrna, GA 30080
Office: (770) 437-0213
Ask for Bobby Joe Kidd tell him Mike Childs told you to call
he may have one he can depart with as I'm pretty sure most of his IDS customers have
upgraded and I know I gave him some equipment in the past.
Worth a shot.
If my memory serves me correct (will have to find some old write ups)
The PRI clocks off the carrier via the Connection to it. The Clocking Cable only comes into play
if it looses clocking from the carrier. So it should work without.
Another resource may be Blackbox http://www.blackboxresale.com/about/facility.aspx
They purchased the a lot of the IDS base and use to sell some stock.