Hi Wayne. I just go to my local model shop and grab a bit of ‘ordinary’ 1.5mm ply and say thank you very much.
No idea what it is. Guessing it’s birch ply, but?
There is a difference between birch and “lite-ply” though, as lite ply is fairly soft and does not have the strength of birch ply, but is lighter , if this makes a difference to your model.
Ashley