Well, even though they are exported as HTML files, you may want to look at handling them as "media objects". The media module, in Drupal 7, gives a lot of control over all of objects of any sort - pictures, documents, etc... or supposedly. I've not had time yet to delve much into using it.
Another option would be to use one of the various modules that would open the html documents in an iFrame, so they are able to be opened, and then you'd close out of the iFrame to be back to where you were.
Another option would be to create a custom content type. In that type, you'd include the name/title of the html report, and you'd have another field to contain the link to the actual html file. Then set up a view that lists out all the published content of that type, and have a default sort and/or allow them to custom sort/filter. Of course, you could have other fields, such as a date when added, who added, etc, but I'm just thinking simplistic on this one.