I didnt see anything about what type of bulb it runs, probabbly t8 bulbs. If you want an inexpensive t5 fixture, just hit home depot. The t5hos are where you will see a price jump. Its easy to get a fixture from home depot and just hang it from the ceiling with some hanging planter hooks.
Currently none of the plastic full hoods sold by the chains will run T5 tubes. They are all T8 and yes, still, T12.
You could, depending on the length, retrofit it to use T5 NO or HO tubes, but for the cost involved in purchasing a hood and the retro kit, you won't save much. Pick up something like the Hagen Glo HO strip.