Brad,
Two places I'm aware of in Durham who offered to do it for free:
Mikes Transmission Service @836 Mangum St Durham (682-7591)
Sullivan's Garage Inc @ 1731 Fletchers Chapel Rd 27703 (688-2816)
I used Sullivans because they were available for me to go on over when I called. Mike's was available later in the day but I wanted to get it done quickly so I'd have more time that day to take the AC out. (Actually only took a couple hrs to get out.. as usual things tend to come out easier than they go in

)
You may want to call some of the smaller shops in your area to find something closer. Don't bother calling larger, chain type shops they will want to charge at least $35.