The bracket for the choke lever was broken. Could I make a new one?

Yes, I did:

How it was done: First, I drew the model in Fusion 360 and used my CNC machine to mill the part from 1.2 mm thick steel.

3D model:

Machining:

Thereafter, I bent the part and nickel-plated it as the final step.

Mounted on the bike:

I’m pleased with the result: