First, your going to have to take the back panel off.
Second, find what is leaking.
Third, go to
http://www.repairclinic.com/ , they have a great parts "detective", where you give you brand, style, shape of the part, size, etc....
I had a leaking washer a few months ago,
found what was leaking, didn't know what
the hell it was, & by answering the questions
they asked I found on the first try.
Good Luck.