When I am looking to Eplus an exchange, I would keep the II site open on my desk and refresh, refresh, refresh. Literally dozens of times a day. Really good stuff only lasts a very short time. Most of my Eplus trades have been pretty last minute as well. And I have had more than a little help from my friends who were looking for me as well. (Thanks Taterhed and Happymum !) It is still early for next winter, don't get discouraged.
Do you have another unit you could start an on-going search with for a larger unit ? If you get a hit, you could call II and ask if you could Eplus with your other unit instead. I have never done this but I seem to recall other Tuggers being able to do this.
You could also put a sightings request for the dates, area and type of unit you are looking for on the sightings board. Tuggers are a helpful bunch!
Good luck!