currently i am looking to purchase some new 300 gallon tanks for 03-05 chevy 2500 series. i have been looking all over the internet at many designs. want i want is a space saver desing that mounts the pump, motor and reel on top of the tank so the bed of the trucks are open. currently, i have only found the gnc industries 300 gal space saver. please let me know if, and what other options are available. thank you guys.