Hi there,
From the looks of it they are no longer making these, but here is some links with information on them:
https://youtu.be/LfIOdK2vhlY
https://lateral-g.net/forums/showthread.php4?t=40990
They are really nice pieces and are rebuildable with standard size bearings, Inner bearing: LM300849, Outer bearing: L44649, Both "Timken".
Also included a trick socket to remove the bearings. If the brakeman rotor adapters don't work for you, there are adapters for Wilwood and Baer available from the person I purchased these hubs from.
Let me know if you have any other questions.
Thanks,
Jon