Steering Rack Leaking

I don't want to jinx what is working so will preface this by saying for right now..... we have a remanned unit installed and as of today and 60 miles on the car, it is working and not leaking. This is number 5..... Since the last post, we installed a remanned unit that was suspect from the start as the box looked like it had been kicked down the road a couple times prior. It lasted all of 35 feet before spreading fluid all over. This latest one is from O'Reilly Auto Parts and is a Master-Pro....never heard of before. In any case, I really don't care as long as it doesn't leak any more.

Can a manual rack and pinion be rebuilt ? Mine has a lot of slop in it -----------------
Are their numbers to identify what kind it is ?