Product is a customizable form? How to...

A friend is setting up a zen cart in order to sell one product. The product is a legal form (kind of like a will but something else). Ideally, the customer would fill in the required information then be able to download and print the form after purchase.

I can't think of a way to do this within the current framework of the zen cart (I know how to set up the product with the download attribute but the fill in option is beyond me). He does have hotdocs which can create a custom fill in pdf, but that doesn't solve the issue of how to make zen cart produce a custom download on the fly.

Any ideas? Do you think it will require custom coding? If so, I know that is outside my capability so if you know of someone who does stuff like that please let me know...it would definitely be a paying job!

yeah you may want to put a post in the commercial section of the forum.
people have to pay to read the posts there so it weeds out a good portion of the non professionals.

I posted it over there too but no response. My friend is getting quotes from the two "computer guys" he knows in tehe $2500 range. Maybe someone who knows more about the zen cart coding can post as to how feasible this idea is?