You could always carve the shape you want out of foam and cover it in fiberglass to finalize the shape. Depending on how much you'd need to use, bondo may be too heavy. For the pic on the other site I might try making a block of foam and then marking and carving what you want out of that. It will get messy though. (I might even angle the face towards the driver somewhat.) This site may help as well.
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That being said, it(the console here) looks to me that the wood on the sides is thin enough to follow the curves. (Otherwise, plywood can be soaked and molded to a form.)
Another thing you can to to get a feel for how the flat panels can bend is to use cardboard and tape. Then use the cardboard as a template for the MDF or whatever you decide to use.
I also don't see where a table saw would be necessary. A simple jig saw with a straight edge and clamps can get you by for the straight edges. I built a lot of things like that when I didn't have access to a table saw as a teen.