The Narglatch Airtech prefabricated kit was a product of Narglatch AirTech. The kits contained airspeeder components that a buyer could use to build their own custom airspeeder. The XJ-6 airspeeder, owned by Senator Simon Greyshade, and XJ-2 airspeeder, owned by Senator Bail Organa, were both constructed using prefabricated kits manufactured by Narglatch AirTech.
Sources
airspeeder, Anakin Skywalker's in the Databank (original site is defunct)
airspeeder, Bail Organa's in the Databank (original site is defunct)- The Official Star Wars Fact File Part 64 SPE 3-4: XJ-6 airspeeder (First identified as Narglatch AirTech prefabricated kit)