I found this jewelry maker on DevianArt/Etsy who makes necklace charms of Tegus! And other reptiles and creatures not usually found accessorized.
Here is her DeviantArt of the Tegu charm
http://missfit1023.deviantart.com/favourites/#/d32p1qr
And her page has several other reptile charms photographed.
Her etsy has some offered for sale; I contacted her about the Tegu charm and she said she would make one that looked like him =D
http://www.etsy.com/shop/NadilynCrea...ef=seller_info