Thanks for everyone's ideas. I should have mentioned that I had checked Ebay and several medical textbook and nursing sites- no luck. I did find a lovely jade bracelet, though- have to stay away from Ebay as much as possible.
The ICU nurses at my hospital have been there forever and a day- they haven't taken the exam and don't want to. No one has the tapes, no one is interested in it. They "know all they need to" (rolling eyes.) Can you tell I am not planning on being there much longer? <g>
If anyone is looking to get rid of their set, I'll happily take it off your hands for a small fee.

Otherwise, I'll be investing more money on more letters after my name that get me no financial compensation- from my current employer anyway!