Is it possible to use Zen Cart to sell merchandise that is to be personalized or custom-printed to a customer's specifications? (ie: business cards, wedding invitations... where the customer would be able to specify the font, colors, wording, and choose a graphic)

If this is possible, which module is needed... or what is the exact location where additional information is available on how to accomplish this.

Thanks,
~allen2007

PS: FYI... I looked (and looked) for the answer before posting this question, so if the info is out there... or if it's been discussed before, I surely missed it.