The Wheels and Brakes are Matco W51 series 500-5 for 1.25 inch axles. I made the axle brake flanges from scratch after reviewing RV builders web sites and noting details on how they were built. I picked up the axle spacers and axle nuts from Wicks and Aircraft spruce. I put the spacer bushings on the bolt mounting flanges for installing wheel fairings at a later date.   

Tailwind Aircraft Construction
Wheels and Brakes