Creating a wordpress template with a plugin that allows users to pay to upload documents.

I'm looking for a template, or perhaps more so a plugin that will provide an order form which will allow visitors to my site to select from a number of services, upload a file (Word Documents), plus contact info etc., and then pay through paypal. The template would also have a few other pages with content/pictures. Ideally I would need users to be charged the correct amount based on the options they've selected from the order form, i.e. a certain price for uploading 1 file, 3 files, or 9 files. Also, if possible I'd like the users to be able to pay and come back at a later date to upload files, at different times etc... Thanks.