The top 3 Craft&Ride® Grip Tape Brush for Onewheel GT S-Series, GT, XR, Pint X, & Pint™ | Onewheel Grip Tape Brush alternatives are
Tire Bead Breaker,
TFL Wire Brush (Grip Tape Cleaner), and
Hella Small Pump.
If these 3 options don't work for you, we've listed more alternatives below.