Make Your Own Maul:
This is what I did:
Go to Ebay and buy one of these: https://www.ebay.com.au/itm/Replacement-78mm-Diameter-69mm-Length-Pallet-Truck-Nylon-Wheel-/254166070446?hash=item3b2d7a74ae
Take it along to your local hardware and look for a round piece of timber that fits it tightly.
Tip: I bought a shovel handle that is tapered at one end. It fitted nice and tight, then I just cut it to length.
You and make the handle fancy if you like but I left it as it was.
Instant Maul