Nicely found, PetitFrereArmada! IIRC, while not as low-profile, the taller 24gal Rubbermaid ActionPacker also allows two cans to be covered.
To the OP another roof-mounting alternative could be the BajaRack Fuel Can mount (P/N BR-FCH2-0) which is not a 'protective' as the Phoenix MCU, but fits...