First of all, how bad is the leak? It’s quite uncommon for the steering racks to go (although not unheard of). I had a cheap run around at one point with a slight steering rack leak and using an off the shelf product in a bottle it solved it and stayed that way for a few years (I sold the car still with no recurring leak).
There are 2 types of steering rack, one type fitted to early cars up until September 2001 and then a revised rack thereafter. I once knew the exact difference, but it’s one of those things that have disappeared from my grey matter. Something to do with the positioning of the sensor and how the car reads the data.
So as long as you get a later mode rack you should be ok. Haven’t done the job myself, but there’s decent access there so shouldn’t be too much hassle.