Not publicly, but I have sent instructions privately to everyone who wanted to have S16B selector. It's very simple to install, no need for soldering. Just get the wires in needed length (varies how you want to locate the selector), plug and use. Sega C2 is almost same, but game PCB needs pins added = small amount of easy soldering. Irem M72 is easy too. Sega ST-V is most complicated to install.
Australia: should be 17-46 Euro, depending without or with tracking. If you want to order, PM and I'll check better.