Are there online variants to "Path of Glory"? WH40K
Mini War Gaming published a series of battle reports of Chaos vs. Orks.

You can find them here (half of them are free to view, the rest need a subscription).

Then, a user named Boff89 got inspired and shared this PDF on their forum. The introduction to the rules is signed by "Eric PB". 

While these aren't the same exact rules used in Mini War Gameing's videos (I think), they look like what you're looking for.

I guess you can also try to ask MWG on their forum to share these rules, or make your own version using the videos and the PDF as a starting point...