file:///Users/dangray/Downloads/IMG_0626.JPG
file:///Users/dangray/Downloads/IMG_0628-2.JPG
This might give you an idea of what can be made. One picture shows parts separated the other the way ti would be working. the pulleys have allen screws to fix it to shaft along with 3/16 woodruff key, on the other side of the pillow blocks there is a collar that locks shaft so it stays in place. All parts can be purchased on ebay. This setup is using 3/4" shaft.