Go to your local remise company and negotiate a deal. You can find them around the train stations. These are generally very small businesses, I'm sure they will be happy to help you out and will be happy to have some steady business.
The remise driver I used when I was in BA in Nov/Dec was reliable and personable. He was referred to me by the apartment rental agency I used. His names is Carlos Sandez-Vecchio. You can reach him at email@example.com
He speaks English fluently.