To find a black light, just google:
urine black light

No quotes, no caps. Loads of hits.

Here is one:
http://cats.about.com/od/cleaningmes...blacklight.htm

Funny, the articles seem to all be for CAT urine, even though I did not put in feline, lol. Guess what that tells you?

- Have you changed all the bedding on YOUR bed? All you mentioend was cleaning the litter box.
- Does the room have throw rugs? Wash them.
- Wall to wall carpet will be a big problem.
- Any other flat fabric, like chairs, those will need to be removed as well. (Believe me, there is NO way to clean and save chairs. )

Do you have a laundry hamper with open sides? Do all that wash, and clean the hamper too, she may have sprayed the sides of it to reach the fabric.