I started looking for Australian sources that will ship and came across https://plyco.com.au/pages/laser-cut-plywood-collection who sell 1200x600 sheets (4' x 2' or 1/4 sheets) and in a wide variety of materials and thicknesses.
Dropped them an inquiry for a sample pack and got this stack of usable bits in the mail a few days later

Big range of densities depending on if the material is soft or hardwood. The Poplar is very light and will suit my R/C addiction issues but in the case of the project below I will be going with Eucalyptus and then Beeswax and Oil for a finish.
Current Project is a new Media PC for me and to maybe sell a flat pack case kit. Fusion 360 Cad assembly drawing still a WIP. Mini ITX Radeon 5 2400G and 250W FSP power supply for the nerds among us.