[Quadraphinic]

Try contacting Replacements in North Carolina. I believe heir website is replacements.com, they mostly handle plates and other table ware, but also have a large selection of collectibles. Their phone number is 1 800 737-5223, these are the people that replaced the crystal dish for one of the cat food commercials, don't remember which one. Just give them a call and give them the information you have, and if it's in their system, they can give you a value for it, might also buy it from you, if you wish to sell.
Cheers Quad