Okay, I think I found some info on the clamps. I've used them in the past and was pretty sure they were a Beechcraft part. They are nice because they clip to bulkheads and the holding rings open up so you can easily add or subtract wires or whatever.
PN is 49246. I found a couple at Preferred Aircraft and there may be more out there. Might check Partsbase if you have access to it. Jim