maybe the Miller single triggers?

a lot of people on this site "demand" double triggers on their doubles

I only shoot single trigger guns due to injuries and have
a Lang & Hussey Imperial Ejector with a Miller single trigger
installed decades ago ... long before I purchased the gun.
What a crude butchered installation on a work of art gun.
Since the safety sears are removed from the WR sidelocks I would expect the same.

I would need a huge price reduction to buy another miller single retrofit from the old days ... not sure how they're done today.

The idea of a Boss single trigger gun makes my soul smile and
my wallet cringe.