I used a boat trailer roller that I got from the local recycle ( Dump ) for $1.00 Au. Cut off a slice to the required thickness, you can reduce the angle of lean. Position the slice on your side stand with tape, retract the stand and make sure it has clearance, move if needed. Mark the holes and drill clearance holes for the bolts, then countersink the bolt holes 1/3 of the thickness of your slice to the size of the washers you will have to fit, to stop it pulling through the rubber. I also acquired a couple of 5" post end caps ( Dump $1.00 Au ) which I put my stand on when it is really muddy. The cap serves multiple rolls it can be used to put parts in on roadside repairs, and water in with detergent when looking for tyre leaks, dog water dish, use your imagination.
Regards Martin.