I've seen a few complete units go through Ebay for around £300
Ducati do a complete conversion kit £££££
I got all the bits together via ebay except the brackets (dealer) and did the whole thing for under £200.
The seat pads don't come cheap and aren't much cheaper second hand.
You need a different bracket and some spaces to fit a mono unit to a bip subframe as well.
Threaded Mode