Here is a smaller quantity of four different types of Dzus mounting plates. Attach them to the chassis and body to provide anchor points.

See also the Type 2 longer mounting plates or the Lightweight mounting plates.

They're individually mounted on a soft rubber backing, so no cutting is required (and no lost parts).

 With 60 pieces included, there are enough plates here for a few cars.

One set, photo-etched .006" nickel-silver plate, by Futurattraction.