anyone rebuilt a steering gearbox?

So I bought a power steering setup from a member awhile back, already had the powersteering gearbox so didnt worry bout that part.
Finally had a chance to put power steering pump and all in yesterday, went and got a belt this morning along with some fluid and was hoping for a descent turnout...no cigar
Started truck and as soon as I began to slowly turn wheel fluid began pouring out of the little black cap piece that sits on the shaft going into gear box(steering shaft)
Is there a "rebuild" for these?
I found a "seal kit", not sure if there is more to it or not
anyone done a seal kit and/or rebuild on one of
these?

Or am I better off trying to find another one?

I have done one on a late 90's Chevy truck, the seal kit is pretty much all you can get for these. If you do attempt to replace the seals be very careful. On the Chevy gearboxes there is a special tool needed to remove the inner workings of the box, there is a slotted shaft that has small ball bearings that ride in certain grooves that you do not want to mess with. I am not sure how similar the Mazda boxes are to the Chevy ones but you can replace the seals, just have to pay close attention to what goes where on these.

Awesome
watched a jeep video and seems like a pretty extensive project if its close to the same
And they are proud of new or remanufactured ones

It can be extensive, but if you are just going to replace that leaking seal then it really shouldn't be that bad.

Well, on the jeep one, the shaft comes out after all the ball bearings(not sure if this one has that)
If it does, then it is a full tear down and change ALL seals