I would spend some time, searching the
138-144, 148-150.8, 162-174 and 406-420 bands.
Post back what you find [Freq and Tone]
With the CBP, BP and ICE with Office in Buffalo there has to be something, it's just a matter of spending some time to find them out.
Here are hree that have been posted before and that I personally caught while driving to Toronto this past Summer.
163.6250 $301 CBP - unk if Customs, BP or ICE as they all share common channel plans
170.7000 $301 CBP - unk if Customs, BP or ICE
167.7625 167.9 - FBI