Check out
http://degrandchamps.com/nursery/growers-catalog/cranberries
They have links there.

Johnny's also has a fact sheet on growing them. I bought my plants from them, and was really happy with the quality of the plants they shipped. Mine are in the recovery phase this year -- I believed the weather man during our drought month last year who kept saying "but tomorrow it's going to rain" -- they got too dry and suffered quite a bit of dieback. They are blooming now, based on what I see I may get a pound. Not practical at this stage but certainly good for bragging rights.

Here is a link that might be useful: Johnny's nice pdf about cultivating cranberries at home