Could always try the faux leather car
steering wheel covers. Did this a couple of boats ago and it lasted many years baking in the sun. Not as nice as leather, but worked well.
Obviously the individual faux covers are not long enough and you will need to sew 2 of them together to get the proper circumference. We used the lashing that came with the covers, but paracord could also be used.
Have also seen people make good looking paracord covers on wheels.