I have seen some B units over the past few months that appear to have reefer units on the roof. I thought they might be just aux air in the cargo box but they seem to be to big for that. I thought I read that Fyda was producing a reefer sprinter as well. All the units I have seen with these things on them have been FedEx CC. Anyone else seen these units or know anything about it? Thanks as always. Layoutshoooter