Hi Andrew, I bought one of these earlier this year
http://www.ebay.co.uk/itm/Hydraulic...790799?hash=item1c4ff8d10f:g:5fEAAOSwBLlVC~n0 to work on my GSa. It was delivered by Gefco at a pre arranged time in a packing case and works as it should, plus at £265 you will almost recoup your money if you decide its surplus to requirements. Just one thing make sure the packing case is the rite way up as mine was not and was a ball breaker to upright by myself when unpacked.