online shop

I need a shop building in PHP with a MySQL database, i will provide full templates showing how each page will look, you will need to script them up and supply full files for me to pass on to my client. The shop will need to be managed with a backend admin area to add new products and new categories. There are currently no goods available to appear (they are still being developed). The shop will need to be fully searchable with 3 or 4 types of information. The credit card transactions will be managed through worldpay so some experience working with this system is a necessity. Once produced there may be a minimal number of amends and I will require a small amount of support to get the shop up and running. Not too sure how much this will cost, but the budget is pretty tight.