I think I ordered this
http://www.etrailer.com/Merchant2/me...Category_Code=
In case the link doesn't work, it's item 31823.
If you search for "converter" on their site, you'll get a list of several, this one seemed to be the best match. It is installed exactly where the OEM one was, you just have to cut the plug ends and splice the wires in.
The OEM converter is behind the left taillight stuck to the inside of the fender with double-sided tape. You'll need to pull the left side panel away after removing the plastic sill at the end of the cargo area. The panel is attached with plugs that pop out and go right back in very easily. I popped out just enough to reach in and put a screwdriver between the panel and the metal to hold it out so I could work on the converter.
As I attached each wire, I verified that each signal, tail, and brake light worked along the way before taping everything up.
It's working fine for me. I don't tow a lot, but I've had no problems.
Good luck.