2 colors availble from this manufacturer on an unusual mold.
http://www.ebay.com/itm/Great-International-Thunderbird-Gaming-Corp-Sample-Chip-Odd-Mold-Brown-/141057224555?pt=LH_DefaultDomain_0&hash=item20d7aa6f6b
http://www.ebay.com/itm/Great-International-Thunderbird-Gaming-Corp-Sample-Chip-Odd-Mold-Green-/141057226803?pt=LH_DefaultDomain_0&hash=item20d7aa7833