They are lighter than an iron bell. Heavier than the aluminum.
I would look around the classified ads in Europe for a used one.
There were enough of them that were brought into Germany by american GI's living there and playing with their US cars.
There are probably still a couple of them kicking around there.
Certainly there should be some in Sweden, Italy and GB?
There is also a "containment blanket" that gets used on automatic transmissioned cars that is certified.
I never used one but would think it is lighter then the bell is.
I don't know if you even need them if you are using the steel flywheel?
Check the rules of the sanctioning body you are running under.
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