Thanks Jeremy.
I made the hub (mounted to the wheel) and steering column from various sizes of brass tubing and turned a turn signal lever from aluminum.

The horn button and mounting hardware (in the bag) were also machined from aluminum.
The three bolts are scaled down versions of 9/32 heads with 5/16 diameter washers. I’ve started to texture the grip of the wheel; I’ll sand the texture off of the spokes later.