http://mytimebathandbody.com/ I've never ordered from them, but from what i remember of other peoples orders, they'll put enough menthol in there to give you frost bite if you ask them.
In the appropriate container you could probably make your own using Proraso from the green tub. It contains menthol, and is soft enough to work into a stick, and yet hard enough to hold it's shape (again, in the appropriate container.)