try this web page:
http://stonewood.safeshopper.com/?502 (The product is heavy, UPS charges will be high.)
Corian is a trademark of DuPont, the generic name for the man-made product is Nairoc, which is Corian spelled backwards.
However, if you live in a large metro community, you could always go to a kitchen re-modeling / counter-top workshop and beg for scraps. Double-sink kitchen cut-outs are a lot of material. @ 25.00 per sq ft, a double sink cutout of a Corian counter top is about $50.00 to $60.00 USD at retail price. Fair is Fair, you have something to trade for the cut-outs?
Phil