mine went out too. Tried lucas (at best it is snake oil) but that seal will only get worse and will just pour out.
I don't think some of the parts are available anymore. If you can find them i'd do the bearings too since you have to take the whole thing apart.
I found a low hour 1030 front nose with a good unit. Figuring the wide fronts don't put much abuse on the steering box. It works great. You can spin the wheel with one finger sitting still. figure on $300ish for a good one.