Brian,

This program is actually pulling from the same images that were previously provided (and still are available) as per previous posts.
We have generally been providing 800 pixel images, which would correspond to a 2.6" image at print resolution. This has generally been sufficient for our stores who print advertisements, brochures, etc.
However, if you do need a larger image for something (full page ad, poster, billboard, etc), please let me know and I'll do my best to get something to you.

The full ZIP file is also available, there are a couple listed earlier in this thread - I do need to combine a few of those into one, but that will be maintained in general, so you can download the entire catalog for reference if you need.