Nice!
It looks like the Schaller 471-8 is no longer being produced, but they are still available on the used market.
On the Schaller STM, I like the looks of that, but it's much too narrow for my application.
After thinking about this some more, having custom saddles fabricated for my 5-string bridge plate is definitely a possibility for the 6-string option.
With spacing at 2 7/8", traditional barrel saddles would be about 0.57" wide and I believe that's wide enough for them to be stable under bass strings.
The 8 string is another matter entirely...there's too much engineering involved to make a small batch feasible.