Is there a workaround or solution? Could be interested to insert for 1.8.
It'll require some developer skills: 1. Add new product attribute control type support 2. Store uploaded file into Nop_Download table 3. Other minor changes
1. Just look how existing product variant attributes were implemented (NopSolutions.NopCommerce.BusinessLogic.Products.Attributes namespace) 2. Use DownloadManager to store uploads
Have you accomplished this yet? I think I might be able to code it but, I would probably mess a bunch of stuff up. I would be interested in the code if you get it to work.