I got the fleece from my mother in law who gave me more than I need, you can have some if you want. The spray bondo I got from Wesco but they called it something else when I asked for it. The stereo stuff I got at OnlineCarStereo.com.
In his tutorial he mentions that getting the smooth surface is one of the things that takes so long. I am sure you can come up with a textured surface that you are after.
for cutting the circles I have a router table and just attached the board to another board with a screw in the middle. I cut the outside diameter first. Then cut the inside circle out by raising the cutter head a little at a time to cut through as I rotated the part. I think it would be really hard to cut it out with a jigsaw.