Maybe they pulled them to redesign the fixing?
It’s this.
We’ve had 30 pairs at the club and no failures yet, but the original design that didnt pass through the QR axle was replaced with one that did. I think there hev still been metal fatigue failures, so are redesigning what I think is already a very good design.
Personally, I’d fix the bracket to the mudguard rather than keep the sliding friction based clamp, because that, rather than the brackets, has been my source of rattles.
As for the SKS P35s – perhaps they’d like to redesign those too. I’ve managed to snap two rears at the brake mount due to fatigue. Still a nice design though.