I have taken my front plate mount off and just put two button head allen bolts into the threaded inserts in the chassis tubes.
By the way these inserts are now turning in the tubes, not quite sure what I'm going to do with these. They would appear to be stainless steel inserts, very difficult to pull tight when installing. I tried to pull them tighter with a bolt but was unable to stop them from turning.
I was also thinking of black plastic caps over the tube ends and black plastic nut covers over some of the suspension nuts & bolts. I have done this on my sidecar outfit and it finishes it off quite well.
I have tried it with the front plate on and off, it looks better off.