There is no chance that anyone in the Houston area is just giving away 6.5 gallon glass carboys, is there? Two?
Well if you don't ask.... Good luck!
Have you tried the usual ways? ebay, local paper ads, Junk shops, burglary of any local newly forming homebrew clubs (JUST JOKING!!!) You can often find these items if you just keep looking....
That's what I figured... doesn't hurt to ask. I know where I can get them for about $25-$27, just can't justify it at the moment.