If anyone needs specific fittings making to connect up superchargers for example, I can recommend:
BB engineering Services in Dewsbury West Yorkshire. Contact is Colin Blackwell. phone 0796 539 675.
I found this company on the internet, and called to see if they could make some special fittings to connect my supercharger and bulkhead oil tank. Colin understood what I wanted exactly, and when the fittings arrived they did the job just as I wanted. Photo below of some of the fittings on the supercharger.
Nick, can you add this to the recommended suppliers?
Looking at your photo, I would strongly recommend you silver solder your fittings and not use lead solder. Copper pipes vibrate and lead joints will often fail over time. You have an expensive blower and it deserves a guaranteed oil feed!