The part number for the valve is superseded to 99-5363, but sorry it is also NLA. By chance is there a name and/or part number on the valve which we might be able to cross reference? If you do find a valve, you can have the hydraulic lines custom made. I'll try to remember to look through the old service manuals I have at the shop, to see if I can come up with anything. Please post the model and serial numbers off the tag under the seat.