WordPress - passing form values to a download manager

CONTEXT

We are creating a Wordpress site that allows users to log-in, select a resource, fill out a form, and then download a PDF that is stamped with the information filled out on the form. We are currently using the Wordpress Content Manager plugin on a Genesis child theme to manage downloads. This plugin has the functionality to control access to files, make a download button conditional on filling out a form and stamp a PDF with static information about the user. The workflow should look like this:

1. User selects resource from a list
2. User is taken to a form and fills it out
3. On form submission, user is taken to a download page where a download link for this resource's PDF is available
4. The PDF is downloaded, stamped with information that the user filled out on the form in the previous step.

PROBLEM

We would like to pass information from the form to the PDF stamper. However, there is not native functionality that allows this. The plugin is limited to stamping information that is in the user's profile. We are wondering what the simplest way of passing data from a form back to the plugin might be.

via Chebli Mohamed