i need a bettery tray pls help

ive converted my savage to bl .it has flm ext tvp.i use cut out emaxx battery tray and 3800 side by side 6 cell pack.i want to use mt 4200 stick pack but its a bit bigger than the 3800s..my question is ,do u guys sell the battery trays that u use on gorilla max separate?or do u have a tray made for savage that can handle 2 packs?this is how i hav my batt tray now.