Why do you need a subframe? Unless you have a Jester kit or simalar fitted then all you need to do is take the rear hump off using the key release then swap for a pillion seat. Rear pegs screw straight into the standard subframe aswell if yours have been removed. If all you need is a pillion seat then post a thread in the wanted section and keep an eye on ebay, they come up quite often. Same for the pegs and if you do need one a subframe realy.