I am looking for some input on finding a powered (amplified) vehicle mounted antenna for a 4510L. The vehicles are very close to the Canada border (less than 2-3 miles). The drivers are able to access the internet in a few places, but there seems to be lots of dropped connections causing issues for them. Could anyone suggest some good antennas (powered preferred) that can be used outdoors on a vehicle? I have limited vendors I can purchase from, but if there are some brands I should stick with (or away from) let me know and I can see whats available from our vendors (we also have a relationship with Verizon so something directly from them may be an option too).