Hey Lynda,
Did you have a look at http://codecanyon.net/item/mobile-case-design-and-personalized-for-opencart/6446229?ref=expertpro
I has all the features to customize and build your own product with your own name. Instead of mobile case you can use your own products and items and design theme using the same customization features.
However if you need any more feature I can also develop them for you.
Thanks