One of the things you could do to solve the problem is to put the Shuttle on top of the Saturn I-B. The thing is a monster and you'd have all the gunk down by the engines, instead of right next to the Shuttle where the tiles can get slammed around like china in a shop full of bulls.
We could build the Saturns, again, but you'd spend a year getting the production line going. Remember, we started from scratch and built them.
Be Seeing You,
Chris