Nightingale-Conant (www.nightingale.com) has many very good programs for listening in cars.
Their programs tend to be informational; ours tend to be better at helping people enhance their lives. But, for the most part, their programs will support the work you do with us.
I've known Vic Conant for years. We talk now and then and get together every couple of years. Give them a try.
That said, you would also be well served by listening to the informational sessions of our programs multiple times. The more you understand our programs, the stronger the long term results.