Wow. You spelled it correctly. That means you know what its used for.
You can probably get one on e-bay or amazon, with a halogen light for around 100 U.S
Little Princess. You asked for help and I genuinely attempted to assist you. No need to be nasty. However when you get the instrument make sure you test it as if it were a sigmoidoscope, "on yourself".
"None are Soooooooooooooooooooooooo Blind, As Those Who Will Not, CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC"!
A "Dislike", Oh Nooooooooooooooooooooooooooooooooooo!