A simple contact card on a 3-5 index card sure would be easy to hand out just before rides. Cheap, simple, effective. Toss it in the map section of the tank bag.

But, what I think SLO1299 was refering to was more like if your ride breaks down in the middle of nowhere---a rider could call someone with a truck/trailer/tools for help. Of course, there is AAA Plus RV which covers motorcycles. I've used AAA several times to tow my own stuff as well as other peoples bikes/cars/trucks.