Sorry for the delay guys!  It turns out what I was looking for was comprised primarily from a 6 string set. DR makes a nice set in stainless so I'll end up picking those up unless Alembic has started making strings again.

If you're looking for custom roundwound/round core string (custom length, too), Gabriel is the man. Steel or pure nickel. I can't say enough good things about his product.

https://www.thegts.co/