Taxi Driver Online

Hi Guys,

Does anybody know a good way to contact drivers that want to put advertising on their cabs?
I co-ordinate advertising on the cabs in liverpool via merseycabs radio network - but the networks in london already do their own advertising and refuse to put out the radio calls etc.

should I go down the route of leaving details with individual garages, or would anybody on the forum here be able to help me out?

I appreciate any help from you guys,

kind regards

Tim