OmniFocus 2 and 3 for Mac supports custom templates for both HTML export and printing. I've created one designed to more closely resemble the in-app UI.

1. Download this file. You can save it from your browser as HTML.
2. Depending on your version of OmniFocus, place the file in either the ~/Library/Containers/com.omnigroup.OmniFocus2/Data/Library/Application Support/OmniFocus or ~/Library/Containers/com.omnigroup.OmniFocus3/Data/Library/Application Support/OmniFocus directories.

Once that's done, printing and HTML exports will use the template. Feedback and suggestions are welcome: [email protected]. Also, be sure to check out my custom perspective icon project.

There is also a compact layout for those who would like a slightly smaller print footprint. You will need to rename the file HTMLExportTemplate.compact.html to HTMLExportTemplate.html before placing the file in the above folder(s).