It would be worth try some wynns power steering stop leak first, this swells the seals, even if it only gets you another year, it's extra time to save up!!
I've used this loads on auto boxes that have lost pressure, and had another 3-5 years use from some that are just down to worn/old seals inc me gf car at the mo, it got the reverse gear back as it wouldn't before, but is 16 years old.
tabetha