Help! LO has been chewing on the mouthpiece to his Foogo straw cup (http://www.amazon.com/Foogo-By-Thermos-Leak-Proof-SS/dp/B000O3I2CQ/ref=cm_cr_pr_product_top) and I am looking for a replacement piece. The problem is... I cannot find it anywhere! I have come up empty when looking on Amazon, Diapers.com, even Thermos direct...

Any super-secret leads or ideas on where oh where I can find such a simple piece????