You can't get the Surly one new, but I know somebody got the Walker Brother (can't remember which brother) copy fairly recently NOS, so they might still have one or two even though they don't advertise them any more.
Bear in mind that they only work with a limited selection of mainly older or lower end Shimano hubs. Most 21st century ones with a 10mm axle should be OK (check the EV PDF for a visual on the spline type, if it looks like an FH-6600 you're good), anything with a bigger axle won't be.
Thanks for that. It was just a silly idea to make a skidder out of a junk Mike Burrows wheel I’ve got in the loft, but the freehub splines on that are different. It’s a bigger female spline. Looking at freehub bodies, I think it might be the same as a Shimano RM30/RM33 but I can’t be sure.
You can't get the Surly one new, but I know somebody got the Walker Brother (can't remember which brother) copy fairly recently NOS, so they might still have one or two even though they don't advertise them any more.
Bear in mind that they only work with a limited selection of mainly older or lower end Shimano hubs. Most 21st century ones with a 10mm axle should be OK (check the EV PDF for a visual on the spline type, if it looks like an FH-6600 you're good), anything with a bigger axle won't be.