You might be best off seeing if someone will make them for you.
I wanted one and it was going to be over £150. In the end I got one of the pipefitters at work to bend me one, all it cost was a bottle of duty free whiskey!
Hi, I have just been researching the internet to find some jockey console backrests with no luck at all apart from one made by Outhill. I have however found a metall fabrication unit on a local industrial estate who also make marine fuel tanks etc. They are measuring up today for a back rest to be custom made. This is your best bet.
Hi Monto, have you found backrests yet, got an as new one off a 5metre Osprey, with the cushion, could always use as a pattern for the 2nd one, can send pic if you are interested?