This can be achieved by manipulating the link and prefix the location of the document with:
/_layouts/download.aspx?SourceUrl=
This is also a good technique to avoid login prompts to open/download documents as well.
http://en.share-gate.com/blog/migrate-sharepoint-2013-what-is-product-catalog
Another great article by Ben to explain the Product Catalog site template and why we should use it.
Now that Cross-Site Collection Publishing (CCP) is available in SPO, we can actually utilize its power in O365!
http://en.share-gate.com/blog/sharepoint-2013-content-search-webpart
This article has a video which has the best explanation between the CSWP and the SRWP. Great job Ben!
Now that the CSWP is available in SPO, we can actually utilize its power in O365!
Samer 365 