Minibox RF adapter and the URC3220 RF remote control

Does anyone know the identification number of the RF adapter module that plugs into the IR port on the back of the minibox?  This is the small piece of RF4CE hardware that will make the minibox able to communicate with the RF remote control (URC3220).  This is a conversion item for the minibox to shift it from IR (infrared) to RF (radio frequency).  I have spent quite a bit of time talking with the people at the Cox Call Center and for the most part none of them have any idea what I am talking about.  If I could just give them an ID number, then they should be able to send me one.  So far my discussions with the call center have resulted in them sending me 4 IR remotes (model: URC2220) and 3 RF remotes (model: URC3220), but not the RF adapter that these RF remotes can talk to. However, at this time, I have another attempt in the mail heading my way.  (I hope this one isn't the standard IR remote extender on the end of a 24" wire.)  My plan is to use one minibox with RF control to provide a signal to about 3 TVs located in different rooms in my basement that are tuned to channel 3, and have one of each of the remotes set up for each of the TVs. The IR portion of the remote will control the TV and the RF portion of the remote will talk to the minibox to change channels, etc.  (the only drawback is that all TVs will have to watch the same channel, but that's OK for my system)  From the picture that I see on the RF programming instructions that I have acquired for this RF adapter, this looks like a small module that is about 1/2" thick, 1" wide and 2" tall with a miniplug sticking out one side that will plug into the minibox IR jack and a pairing pushbutton on the other side.

Has anybody else managed to do something like this, if so, then please provide how you managed to do it.