I'm not sure what part of CT you're in, but I'm in SW New Hampshire, and the Agway we go to in Keene, NH was advertising Rhode Island Red pullets for sale just a couple of weeks ago. You might give them a call and see if they are still selling them: (603) 357-5720. It would probably take you roughly 1.5 hours to get up here via I-91 from the Hartford airport area.
I think the dog crate/garage set up seems like good sense in this extreme cold. Hopefully it's going to warm up a little this weekend (20*F will feel luxurious!).
Sorry for your loss. The first winter I had chickens, I had just a pair since I lost 2 of the original 4, and those two kept each other warm enough all winter. Even now, I have a flock of 8 total, but those two original girls are definitely a two-some and run the flock. I believe they do get bonded.