I do! The Rabbit was a two piece device that would transmit an RF signal over a thin two-conductor wire and translate the signal back into RF, and at the same time, act to send an IR command back the other way.
There are now many RF remotes that work quite well. You can probably find a device that does the same 2-way as the Rabbit, but wirelessly. I'm not a walking catalog, but I'm sure others will chime in with some info.
Anyone?
Larry
www.fineelectricco.com