Apparently, according to Brakebuddy,(the braking experts)
95% of the authorities referenced don't think you should be required to have brakes!
From you first response, you seem to think you need them for your application. So get'em!
One point to remember.....
MIC your spindles or check your bearing numbers before buying the brakes.
axles commonly had 1" straight spindles.
Modern ones have 1-1/16" straight spindles.
Your new hubs must fit if they are to be safe and effective.