Here is the problem with acrylic - it cracks. Just from looking at the alps plate DXF file, anyone wanting to build a case where the halves fit together like the VE.A, there is only a 1.65mm (2.4mm for cherry without switchtop opening) cap between the switch-holes and the outside of the case. That isn't going to last long and is probably among other reasons Zefyr went with poly-carb.
For cherry, using 1.5mm acrylic for the plate and 3mm underneath for support similar to what winkeyless does. Anything alps needs a metal plate, assuming nobody wants to hotglue their precious switches in.
Just my thoughts, maybe someone else is thinking outside the box.