You might give this a try
Being in New England, I use this
If you have a problem findng what you want on the first link, maybe you can drop an e-mail to the folks at the second link, or visit cellguru.net and send him an e-mail. Cell Guru is mainly for NE, but I am sure he would know where to get the info you need.
T-Mobile’s new marketing campaign for Vermont and Western New Hampshire:
“Try T-Mobile’s blazingly fast GPRS data network. We’re faster than iDEN and TDMA combined!”