Everybody else had great suggestions.
If you resort to cutting plastic foundation, a table saw does a fine job too if you have a sharp blade with a decent amount of teeth. A thin kerf blade seems less prone to chipping too. I’ve cut lots of Pierco on my table saw. The biggest problem is the stuff sticking to the surface as you try to slide it though the saw (assuming it’s waxed that is). I deal with that by using a piece of cardboard under the Piecro to make it slide over the table easily. If you try to cut more than 2 sheets at a time, then chipping is more likely to occur.
I’ve never tried cutting the stuff with a bandsaw, but with more teeth/unit time, I would suspect Fishman is correct that a bandsaw would work well.