I had to make one for the Rover from scratch
Ooooh, how interesting!
What did you make it out of? You don't happen to know a supplier of CroMo steel suitable for the purpose do you?
I 'd like to be able to make an ahead stem that looks slim and elegant to match a steel frame. Such things have been made in the past, but no sooner had threadless headsets been accepted, frames became "chunkier" and the stems were made to match. Slim ahead stems are very few and far between.