Stick pack LiPos in C4.1?

[RandomConflict]

Hi guys,

Seriously considering purchasing a C4.1 conversion kit (When they are back in stock!) yet just wondered whether it was possible in any way to fit a stick pack LiPo on the chassis. Recently upgraded to LiPos and don't particularly want the expense of new cells aswell. Also, anyone have any idea on when the complete C4.1 kit will be available for purchase?

Many thanks in advance.

Alex