No problem! I think some people use cutting board material which is basically the same thing. If you need an actual name or company that makes the pvc board, let me know, and I'll call my buddy down at the local plastic shop and see if I can find out for you.
Hey, the pvc board came from the local plastic/acylic company here. Not sure what exactly they use it for, but it is similar to star board. Starboard is usually used on boats to make doors etc. Kinda expensive so I went with the star board. Holds up really well and I just silicone it down.