What Happened to the RDB bolt+barrel DIY kits

So back in Nov '24 I got a the 99D517A kit, 9mm bolt and 8 inch barrel RDB

I paired it with a standard AR15 lower and lightweight slick side (no forward assist) upper, and used the KAK Industry Mini Milspec buffer system. It works great. I did have a few stoppages at the range because it was very dry but after oiling up it ran great.

I let my friend shoot it and he was absolutely blown away at how smooth shooting and low recoil it is compared to my other Matador Arms 9mm which is pretty heavy recoiling by comparison.

So now he wants to build his own RDB and we cannot find the 99D517A kit anywhere online.

Is the whole system discontinued? Did it have issues? Maybe are they coming out with an RDB 2.0 system soon?