My solution for the washers was to keep the donor one and zip tie it in place for inspection. If you head over to the Roadster or any dune buggy forums you'll find that most pass inspection by keeping a bottle of windex in the passenger seat.
The bumpers are supposed to be 2.5mph bumpers, which the 818 clearly doesn't have, but my inspector said implementing them would ruin the look of the car so he signed off on it .
In all reality, the definitions of everything there should be per the Michigan vehicle code, but since nobody has ever read that common sense and logic prevails.