Is there any addon for zen-cart which allows a preview image of a product when all attributes are applied?

like in my case i have a jewelry shop

i would like it so after they choose their beads and type of jewelry (color,size etc) it will then show the product exactly how it would appear when they receive it.

Ive seen other shops with this feature, but not a zencart one

example site would be
http://www.jewlr.com/products/JWL002...ing?from_url=1

when you run your mouse over the 3 thumbnails they change, as well as after you fill out the form of attributes the large image changes

would appreciate to be pointed in the right direction if anyone knows of an addon like this or a way to integrate it into zencart

thanks