Sorry to hear about your nook!
This youtube video shows a Nook Glow getting opened up - it is probably similar to the Nook touch. http://www.youtube.com/watch?v=CbDEIb6oJ7c
You might look around on youtube for other videos, too.
You might also keep your eyes open for some bargain nooks - the last one I purchased was $65 on Ebay from B&N - it was a refurb.