Due to hip and knee problems I need to fit my saddle a couple of inches further back is there a bracket available? Due to hip and knee problems I would like to move my saddle  up to a couple of inches backward, is there a bracketed seatpost or similar available? Any solution would allow me to ride for longer periods, an answer would be very much appreciated.
There are offset seatpost but I don't know of any that are more than 25mm = 1 inch