powerbook cases and protection

hi, i have a 17" powerbook g4 and like many the hinges are starting to get a little loose so it springs open quite a bit.

after bending the little tab things it stays closed but it isn't really a solution, i'de like to get a case much like this one:

http://www.speckproducts.com/products/seethru/17-macbook-pro/21

but havnt been able to find one for the powerbook.

any help or good recommendations?