I need to find one at a decent price

I read this somewhere on the forums...

if you're talking about the 'special' one for the top strut bolt, and you fit the allen key in it then you can just make your own.

i can't remember if it's a 17mm, double check.
-go grab a socket of that size
-grind down two sides of it so they become flat.

basically like this:
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-grind to the point you can fit a wrench on the flat sides.
-just stick your allen key in the top hole, and a wrench around the socket, voila, homemade tools!