Mech would be a functional clone of the Simplex retrofriction one-way clutch, a.k.a. the best friction lever experience bar none – but every internal part is straight out of McMaster-Carr.
“Angled barcon” would be a bar end shifter with the mech / level angled 25 degrees or so from the bar clamp, the better to work with townie bars.
Each style should be individually customizable for
amount of cable pull (should work fine with 11sp systems)
handlebar / downtube clamp diameter
color of lever and body (within Shapeways color options)
Pricing TBD but should be less than what a pair of Simplex SLJ with worn out bushings lists for on ebay
I have a rear one of those paired with a Campy front on my townie, but I’d happily replace them with any design of yours! I’m also into a pair of downtubes for my ALAN, the vintage Simplex are kinda clapped out.
I’m sure we could use some barcons at Backalley for Crust builds (friction 1x12 Eagle!)