M1A1 Bazooka Stock

I have some plans for a M1A1 Bazooka, to help me build a replica version, and the metal work portion of the plans are quite good, but the stock plans are very basic, and dont include the internal cut out for the batteries, or the trapdoor on the bottom of the battery compartment.
I just want it to look a bit more authentic as a replica when I build it, so would like to expand on the stock area a bit.
Does anyone have plans for the stock? or an original sample thay can photgraph/measure for me?
Also would like to know what wood was used to produce the originals?
I am from Kiwi Land (New Zealand) so they are not that common here :) and I am picking I will struggle to find a sample here :)