For those that may want to have a more recent version of this module instead of waiting (assuming you can get it), Necromancer Games did a conversion to 3.5 and its a full PDF, so print quality is top notch.
It's an excellent conversion.
Goodman Games did an updated version of Dark Tower for 3.5 back in 2007. It was much needed as the original was bonkers, but hey, that's 1st edition Judges Guild stuff for you. I have included the Introduction from the 3.5 version so you can have an idea of what changes they were able to make...