Selling unique products or services, and notifying it to provider and customer

Hello folks!
I'm trying to figure out how to do this in marketpress:

I want to sell taylor made digital products.
The process is:
- Customer buys product X (a logo for example) and provides proper instructions about it.
-Designer gets notified about the purchase and designs the logo. He/She delivers it within the site. (I think this can be delivered as password protected posts.)
-Customer downloads the product.

Do you think this is possible?