I got myself sorted, plenty of breather pipe, clear not black as is B4V's, not that colour matters, couldn't get a 5 port push fit connector, so got 3 equal tees and a straight elbow, which will make exactly the same but with less radius curves on the pipes, all together F.O.C. lucky me :D. But if it's of any interest to anyone else, the pipe size is 8mm and it's bog standard air line, it fits the breather pipe as snug as the proverbial.
Credit where credit's due though, the "how to" photo's supplied by B4V are very good, although I'm not over keen on drilling the bottom of the snorkel to feed the breather, unless well sealed it's a weak point for water ingress.