I have a Corbin seat and black tank for the GT1000 available. Asking $200 (+shipping) OBO for the seat, $400 (+shipping) for the tank. Both are in great shape, no issues at all. Tank shows no signs of warping, bubbling, or distortion, has sat empty in my garage for about a year. Will post pics soon, probably later today. Had the Corbin on my GT1000, very comfortable. Includes back rest. Bought the tank thinking would convert my SC1000 to a GT1000 for more comfort, but changed my mind.