I've had good results getting spurious rams repaired at hydraulic repair places where they will make/modify to replace seals etc. Quite cheap too think I paid about 40 -50 quid for a place to make a new piston for a digger ram that was bent worth finding somewhere local and taking it in you've got nothing to lose
thanks guys a friend is going to give it to a place in Newcastle tomorrow for a quote would have re sealed it ourselves but cannot get it apart without butchering the outside of it .also found out higham marine sells hydrodrive kits so ill get a price for just a cylinder of them .who is specialist small craft whisper do they sell hydrodrive stuff or are they hydraulic repairers