Clone E-Commerce Site & Deploy

I need an existing e-commerce site duplicated for my own domain. The original store was built without Shopify, WooCommerce, Magento or any off-the-shelf system, so you will be working with plain HTML/CSS, custom PHP or whatever stack the source uses.

Here is what I’m after:
• Recreate the full front-end and back-end functionality of the current store.
• Replace all product and banner images with my supplied graphics while keeping text, layout and flow generally intact—only minor tweaks where visuals require it.
• Upload the finished copy to my hosting account and make sure everything runs smoothly (checkout, contact forms, responsive behaviour, page speed).
• Point my URL to the new site and confirm DNS propagation so the store is live under my domain.

Please bring solid experience in website cloning, clean code practices and server configuration. Once deployed I’d like a quick walkthrough of file structure so I can update content later.