Ok I got my MATO plastic tracks today. These are the ones Dan recommended to use since they have metal end connectors and guides. I don't know if they are any more robust for operation than the HL plastic tracks, but they are thicker so they tread may last longer on hard surfaces.
They DO NOT fit the HL drive sprockets, metal or plastic.
I got out a MATO aftermarket duckbill T74 set of tracks and test fit the drive sprockets with these plastic tracks, they do fit.

Now the down side...
The set I received has some issues. One track is fine. The other I noticed several spots where the track blocks were further apart than the others. Upon inspection, I realized the blocks do have have two holes drilled in them like the metal ones, they are hollow, with spacers in various important spots to maintain directional rigidity.
The cause of the extra spacing between a few of the blocks was the cross pins were bent into a V shape inside the hollow track block, allowing lots of slack between those two blocks because of the engineering of the block. I painstakingly pushed one bent pin out, and straightened it and put it back. A serious pain in the ass compared to the metal MATO track pins. Im sure the pins got bent up while being over pressed into place. I don't know if these things will run and not bind on the sprocket with the extra space between a few blocks. I will eventually put on the MATO sprockets and try them out.