Want to start an AM Carrier-Curent broadcast station? Good luck finding couplers.

A friend is looking at starting AM Carrier-Current Broadcasting for himself. Problem is, the AM transmitters are not too hard to find, but finding Carrier-Current Couplers is getting to be more of a challenge, since when Radio Systems and LPB, Inc., couplers come up for sale on ebay, they go immediately. So, someone wants them. However, I found this on Digi-Key's site. [www.digikey.com] Has anyone ever tried this unit? It's meant more for data transmissions, kind of like DSL for PLC, (Power Line Communications.), a.k.a. same thing as carrier-current coupling really. What I don't see is how much power that this unit can take. That, and it's all fixed tuned-coupling, a.k.a. not adjustable like a Radio Systems CP-15 Coupler. Anyway, it's what is out there as a possible Carrier-Current start-up.