Yeah I've skipped Penrite because convinced they had a suitable oil back when I was looking. I settled on Nulon's as you've listed. The label has changed a few times as has the spec sheet. All I need to remember, is as long as it's the yellow 30 and low saps then I'm good to go. That other 5W30 oil (blue 30) is ok for those wanting the lower 5W30 fuel saving oil for either fuel types. Nothing wrong with that, I'd use it in an old jalopy. I'd say they've made the wrong link to that product for the diesel drop down list, it's full synth. but not specifically for Diesel DPFs as you've noticed nor in the Diesel section.
this is the old label (and there were others before that)
and new
I've used that oil from the first change with the car 120K to what it currently is 175K. M2C913-D has been superseded but simply making sure it's suitable for DPF's in the correct grade is acceptable. You'll see my review on stupidcheap if you look. lol