Hey, does anyone know a good website that would let you add an item, and add options for an item?...

To be exact... Purchase the main item, then add items to it, such as a computer, then add x amount of ram, and x amount of hard drives, etc.

A perfect example would be this site:
1U Mini Server Entry Level (budget, value priced, cheap, low cost, affordable)

Anyone know of anything like that?