> What are good Brokerage Company's that can search stations
> across the US that borker air time?
>
A media or radio brokerage company assists in buying and selling stations, not time on such stations.
You literally have to specify your markets and ask locally in each one. Be prepared for cash in advance (checks must clear before airtime, etc.) for a new venture. Brokered statins are like the airlines... you pay prior to boarding.