Here is an idea for you...
Locate the round version of the lights that they use on a pickup with the snowplow attached. Pickup owners with snowplows need these lights as the plow blocks the stock headlights on a pickup. The ones that attach to a bar above the snowplow mount. These have both high and low beam, are authorized for street use and I've seen them with chrome mounts. Newer ones are square but there are a lot of the older round ones around.
Jerome