Well, at least you’ve still got some oil in the rack and that’s good…
Order some new rack boots from Sunbeam Specialties, get some 75W-90 gear oil from your local auto parts place, and get ready to get a little dirty… you may also need to get a tie rod end (ball joint) separator. If you get the kind with the screw that pushes on the tie rod stud while gripping the steering arm, then you’ll likely be able to reuse the tie rod boot etc. Otherwise, using a picklefork type separator will usually damage the boot.
The alternative to removing the tie rod from the steering arm is to remove the steering arm from the suspension upright. Either way you need to remove the tie rod end from the rack arm. Mark the location of the adjusting nut on the rack arm, so you can get the alignment back where it started.
The general procedure for rack boot replacement should be covered in the Tiger shop manual, online at tigersunited.com, IIRC.