T Shirt Designer

I require an online T-shirt design software using Laszlo or Flex with mysql database. Its prime use will be for customising T-shirts but we also have plans to add other products like signs, flags and various promotional items. The software must have the flexibility to set up various products. An admin area will be required to allow a novice to add and manage products. A checkout area is also required to allow the custom designs to be purchased and the software will need to store the custom design in the database and email the order & design to my company and the user. The interface must work like click-shirt.com. Any graphics can be supplied by our in-house design team. If you have an alternative programming language solution please suggest its benefits and I will consider switching from laszlo/flex.