Have any of you guys seen these seat or the 3-wheeled scooter they go in? http://www.motosportsparts.com/s.nl/sc.14/category.48866/.f At $80 and only weighting 5 lbs they seem like they would be a good possibility (and the scooter looks like fun too). Dean Swanson '62 A.H. Sprite mkII Holly Springs, NC