Hmmm, yeah, I dont do them type ones, that's gotta be encrypted and linked to banking etc ...
That site was built by these people.
Shopping Cart Software by Volusion Ecommerce Solutions
Make some enquiries with them.
Also see the layout of say Sherrills, Wesspurs Baileys etc and get an idea of what you want.
After the site is built, up and running you might then want to look at some SEO for it, can help there, even if they remain the builders etc we can send through suggestions/changes. Then there's the offsite SEO to do, can help there to a little.