Interesting question. In 1981 it would have been impossible. However, with computer driven cutters, it would be possible to make tiles to order.OK, so you have as permanent cargo a tile fabrication facility and spare tiles.
Which, all told, would probably take up most of the payload volume...
I'm sure the equipment would take up a lot of space, using it would take training, and once cut, how do you install them when the adhesive isn't designed to work except at precise temperatures?
Oh, you just use KRAZY GLUE! </sarcasm>
Heard a good interview with Miles O'Brien on KRLA radio this a.m. He said that replacing tiles was impossible for many reasons. He said they are like "27,000 different snowflakes," each one is different and you couldn't carry a replacement for each into space...and the complicated process of applying the tiles *is* "rocket science," he gave a little detail about how complex the process is, and he said attempting it in the void of space was an impossibility.