Link store products to custom designed product posts

[CraftyGirl]

I already had all my products created as posts, so instead of redoing all that work, in addition to fighting different layout issues, I created my products in easycart and then added the shortcode i.e. [ec_store modelnumber="WoodenCacti"] for each product onto my already designed posts. They look great. The only problem is when I go to my store page and click on a product it goes to the product page that EC designed not the post that I want to use, that has the shortcode on it. How do I have the store products link to my posts instead? Thanks for your help.