Buddy I ride with still has in his 14 cat. They went out of buisness and he had a local machine shop make a part that wore out like Dragonalain stated.
Had klim boots and motor fist both laced boots and don't go fully to top with lace. Still rigid but works for me. Soles on both lasted about same as I tend to wear the toe out kicking the ice off the doo running board.
There are more brands. I would try to hit up all dealers and try on as many...
You can buy online at different places. I know Trick Tools used to sell tire grooving guns with different sized blades. Think they are the same thing but could be wrong. Im sure there are some tire shop guys on here.