Tracks of the NYC Subway review for Digital Downloads

There doesn't appear to be any way of automatically fulfilling digital pre-orders. I will soon have several hundred paid pre-orders, but the digital file will not be ready for another 2 weeks, and I don't want to have to go in and manually fulfill every single one by hand. I would happily pay for an app that added this functionality and worked 100% reliably! Also note that in the last year about 5% of my digital product customers were never sent a link to their paid order. NOT ACCEPTABLE.