Break a leg - I've done the show (from both sides) - and no, I don't have it typed it. Too much work for a preexising script. Not interested in doing that kind of work. The published script is fine for me -
as to being sick of the show.
1. take a deep breath
2. Give yourself a break- a real one of at least an hour or two. Find something mindless to occupy yourself - easiest to think physical labor - gardening, the gym, long runs without a phone, something to get your blood moving and stop your brain to give yourself a mental break if you don't have time to take a real one. And plan time to do NOTHING scholarly (even an hour of TV or reading something silly and trashy). Believe me, all that work will be there when you return, but you will be more refreshed and able to deal.
3. find fun things to look for in every run - count the actor tics, note the in jokes, who screws up nightly, what do you and the techs sing together and what you can rewrite. how much of the show you have in your hands and no longer need to think about, etc.
4. know that we all go through shows and/or days that are phoned in, but make sure you have a level of professionalism that gets the job done well regardless. It's a job, and sometimes jobs are boring. We don't have to enjoy it, we just have to come in and make it work.
5. find something to look forward to nightly, even if it's a drink or a piece of chocolate after the show, as a reward for surviving. What do you love to do. Can you do any do any of it during the show?
6. Count off the calendar so you can see progress toward closing night. Name the weeks. Name the nights after each show. Invent awards for the cast and crew. If you have time, bring crosswords.
This is a great opportunity for you to find out what you need to do to stay sane. This is the time. You want to find this out before the first time you go out with your first long-running, 8-show-a-week production and discover, six months in and someplace a million miles from home, that you can't stand it one more night.
good luck (or, break a pencil)