first off, welcome aboard!!
they are in-stock, just not the wanderers
http://www.rc-monster.com/proddetail...540C_XL&cat=20
these motors have a built-in heat sink and screw on end ball.
the only down side is that they have "only" 50,000 rpm bearings. since you will be using 14 cells you don't have to worry about that. the bearings can also be upgraded later in life.
i run a 540c 9xl in my E and i love it.