I am having a tough time getting a seat that provides my passenger with a width of 14 or 15 inches the stock seat passenger seat measures 8 inches that is not big enough for even a child and mustang 2 up seat is only 11 inches it seems the major problem is the freewheeler body has an indentation that the stock seat fits down into any help or suggestions will be greatly appreciated I am considering having an upholstery make one using the stock seat base