We need to create links in our (rather large) PDF catalogue to add the desired product directly to the customer's cart.

We have been able to achieve the desired result by using this url string:
http://mydomain.com/index.php?main_p...ucts_id=295168

The problem is that we need to be able to call it from products_model instead of products_id and can't seem to figure out a way to make that work.

Any ideas would be most appreciated.