In Ontario, ERB Transport out of New Hamburg, has a fleet of owner-operator reefer vans in operation. I personally know two of the van O/O's, and they are doing well, although they are suffering a bit now due to the general economy. The rates are good, mileage can be as in automotive, anything from a local run to a McDonalds 'cause they're running low on hamburger patties, up to a 2500-mile, one-ton load of specialty steaks to a downtown "hoity-toity" restaurant in some far-away city/state/province. They also run non-reefer freight to fill in when the reefer side is slow.
Unknown as to whether they hire U.S. brokers or company drivers, but they are a top-notch outfit as far as pay, benefits, and equipment goes. Web link included in case you want to pursue it further.
Regards.
Dave
Welcome to the Erb Group of Companies - United States and Canada Truck Transportation Service