Looking for a stem shift mount setup integrated into a 1-1/8" headset spacer.

Problem Solvers makes a bolt-on downtube shifter mount that actually will work, but there are no cable stops incorporated, and their own flavor of bolt-on cable stops don't play nice with the shifter mount when both are mounted on the stem...

My google-fu has failed me -- anyone know of an off-the shelf solution? Anyone know of a custom builder who has done something like this? Any builder reading this up for a small project...?