before you go molesting your bike, might want to check a few basic things first.
open the light up look in there see if there is any corrosion, loose wires, rust or loose stuff you can fix. if it is something loose you might be able to tap it with a soldering iron and fix it.
i believe overseas they use led's in some of the bulbs but in the states because of some stupid law, they have to use incandescent bulbs. you can't swap the two out, the electronics on the bike won't like that.
with that being said.
if AF 1 does not have any assemblies left, Energica of new england has parts too he might be able to part with something.
Also Energica USA is still open and they do have some parts laying around, have you reached out to them to see if maybe they can send you something.
Aaron