Add downloads to existing products and update existing orders

I have created downloadable bundles and they work fine, but now I need to add additional downloads to the bundles. For example bundle A had 2 downloads and now it will have 3 downloads. I can add the additional downloads and they work fine for new customers, but existing customers are not able to download the files as they do not show in their download list from the original order. What can I do to allow the previous purchasers access to the new additional files?

Thanks,
Andy

You could edit the table:
orders_products_download

and find the existing Downloads for the Order ...

Then, Insert a new record with the correct:
orders_id
orders_products_id
orders_products_filename (add new download name)
download_maxdays
download_count
products_prid (copy from other downloads for this order)

I don't know much about editing SQL tables. Anyone have another idea?