Pretty simple stuff compared to worm drives and e-bike hacking, but I've just had a batch of Pace cable guides done. Resin stereolithography:
I drew them up in Fusion 360 and had them printed by Weerg in Italy, who I find to be fast, cheap and really versatile in what they offer.
Original at the front. Mine fit with separate expanding pins rather than the moulded in ones of the original, which failed...
My company recently bought a Creality K1 Max, so will be experimenting with bike and framebuilding stuff soon.