Battery Tray Help

[InsaneRC]

OK looking at the Battery Tray Kit on rc-monster store. I am unsure what size to get.

I will be running
Team Orion LiPo 2S 2P 5000mAh 20C Platinum TRA Plug
Measurements:
Length: 137.5mm (5.4")
Width: 47mm (1.85")
Height: 23mm (0.91")

&

7.4V 5300mAh 2S 25C LiPo, Hard Case: Traxxas

Unknown of the measurements of it

This will be going into a Mugen MBX5R

Hoping i don't have to go custom.