Here is an LPB 6a Carrier Current Transmitter for someone, and oh by the way there is also a coupler listed:
http://www.ebay.com/itm/LPB-6A-AM-Broadcast-Transmitter-Carrier-Current-...
http://www.ebay.com/itm/LPB-Transmitter-coupling-unit-TCU-30-Ham-radio-b...