Recently had this problem on my boat.Virtually any hydraulic repair shop should be able to sort this.Take it off ram yourself and drive round a few workshops.
In my case it was a w/end and they also had to order in some seals.Was sorted on the Monday,cost 60.00 inc labour and bits and VAT.Will cost loads more if you call out any boaty repair people.
<hr width=100% size=1>If it aint broke fix it till it is.
If it is just the seals you need,and it probably is you can contact me at www.martins-rubber.co.uk . We should have them in stock or can make them at short notice to order, I would need to see a reasonable pattern and/or sight of the metalwork. [I am based in southampton].
Regards Paul.
Hope this doesn't break any rules on self promotion!
Welcome to forum.Any sort of specialist help always accepted gratefully.Quite a few here are sort of involved in helping fixing stuff in a not to obvious self promotion way.Advice is most welcome esp. in the "it is best done like this" or similar.
<hr width=100% size=1>If it aint broke fix it till it is.