These days most people are using one of these:
http://www.statelinetack.com/item/bucket-cart-for-40qt-muck-bucket/BRE22/?srccode=GPSLT&gclid=CO-KoY7Xy88CFYNGXgodYVgJIg&kwid=productads-adid^53091238428-device^c-plaid^109332507948-sku^70002-adType^PLA