Mouse feet

My Logitech G9 needs new feet it feels gritty when I move the mouse sometimes and its gauging ruts into the mouse mat so I ask you folk where to buy some, I found the some places such as everglide.com but they do no do the G9, they do everytng else.

Post ads such as '' buying broken mouse '' on kijiji etc you'll end up getting a bunch of feet for a low price (shipping), my friend does that to restore alot of items.