Create Zen Cart Plugin for product price change

We need a stand-alone Zen Cart plugin that will change the price and product image when selecting a product of the same Style. See This page and how it works when you select a different product from the drop-down menu. [login to view URL] This is how we want it to work. Setting it up as it is, by fragrance as the main subject matter is fine, but we need the option to change the main subject matter. This MUST BE A STAND-ALONE PLUGIN WITH INSTRUCTION ON HOW TO ADD IT TO ZEN CART! Be sure to use the latest version of zen cart.