If you have someone who can cut you some carbon fiber, assuming you don't want to modify the stock top plate at first, you can make the plate over the servo mount pretty easy.
The stock servo mount pieces are actually pretty beefy, and from what I understand on the ofna forum about the mounting of the speedpassion ESC, you could have uses the stock mount positions for the servo assuming that you used a smaller ESC like an RX8 or MMM.
I'll will be giving this a look and see what I have to rig it up that way. But I would say compared to how high the ESC was on conversions that hung it over the rear center driveshaft, this is still lower.
here are some pics of what wiseman has now as the speedpassion ESC popped:
