Hmm I just noticed that, oh well I gess nobody at the time contacted him.
It says to contact him on his second video with link mounts.
I think I will buy a lathe for Christmas and just make a few sets myself. (not for sale)
I will however do it totaly different, than the units show. No internal boring, and 2 fullsize skateboard bearing from the outside with an external retainer.
Way simpler to do all the work from the outside IMO, and the skate size roller bearing should be stronger just based on size, and more room for the retainer to clear the 17mm hubs.
skate 8x22x7mm wide vs 8x16x5mm wide
Again i dont plan on selling them if I ever do get the lathe, unless SS never ends up re-releases his units ever again, also is there actually a profit to be made?