On Sun, 6 Jan 2019 17:20:07 -0800 (PST), Michael
wrote:

I need to make a few of these bad boys.

https://halcyonyarn.com/weaving/6600...5--ski-shuttle

The base is 1/4" plywood that's bend to form the ski. It needs to be high quality plywood, but I'm not sure what to ask for or look for. Is there a name or name brand of plywood that I should be buying?

Looks like cold-molded to me. Buy or cut the veneers, make a form,
glue it up in the shape.

Here are a couple of videos:
https://www.youtube.com/watch?v=OQfrQXvbwtE
https://www.youtube.com/watch?v=S8cQz4rSit8

You could also bend solid wood.

Generally speaking plywood is not bendable after manufacture. There
is some that is flexible but that kind won't hold a bend without
support.