There are several threads on this topic for you to check out like these two:
I saw this product at LDI and was very impressed with it however I still haven't found a customer who actually owns it. http://www.eartec.com/ For about $2200 you can get a kit that includes three digital full duplex wireless headsets and an interface that simply plugs into any wired clearcom jack. They also can operate independantly as their own freestanding full duplex wireless system. It looked really slick but I would really like to hear a first hand recomendation before buying one.
I'm not totally sure whether Clear Com and Telex are related but at the very least there is more difference than just logos. For example, if memory serves me, Clear Com wired systems work on unbalanced system, where as Telex wired work on a balanced system. I know that the Telex body packs are compatible with both types, however there is a jumper inside the pack that needs to be changed to work with a Clear Com system. This is at least true on the newer Telex stuff.