Welcome, @chapped hoop! I'm not on FB, so I don't know if any digest PDFs have been shared. Perhaps @badams30, or someone who joined that group will reply here.
On the box images - I would also not know how to go about making boxes from template images. I'm guessing there are companies who specialize in such things who could do it.
[Also, just fyi - I think the images you shared are too low of a resolution to be truly useful for their intended purpose. They are more like large thumbnails - so they probably fall under "fair use" as far as giving an idea of what such a template would look like and allowing us to discuss it, but please don't share the hi-res images].
Cool boxes, if the files were large enough to print, you could probably just measure the flat, untrimmed stock to ensure it would print correctly when you printed it. I haven't done a box, but someone I know did one at Staples, the only downside was that they were limited in the thickness of cover stock they could print on, so he said his boxes were a little flimsy, but good enough.
As for digest size print ready files, I don't know of anyone with those. I have the same B/X combined files that everyone has been printing, perhaps they could be reduced? I don't know anyone who has printed digest sized though. That would be VERY cool.
I'm quite happy with my B/X omnibus hardcover from luLu, it's been sturdy, well-bound and good quality.