I've had a lot of success with Miva Merchant, www.miva.com . Miva Merchant is a full function online store solution, that offers a product catalog as well as shopping cart services.

If you only need a shopping cart, it's no match for your requirement. But if you want a robust online store solution, it works great.

Ron Baker
www.apex-systems.net
www.hilton-head-property.com
www.hilton-head-island-real-estate.biz