Check out tractor supply company..
They sell a nice one that fits...
its something like 315$ in anadized(sp? black) aluminum diamond plate.
The lock mechanism is pretty good. double insulated.. etc.
I forget the brand but they have about 4 models..
anadized .. and standard alum diamond plate.
Deep.. and regular
They normally offer 10% off if you get their credit card..
thats what I did.. paid if off same month then shredded the card :)
Call the store.. they dont list it on the website.
EDIT: I think Lowe's also has one that fits..