this was around 18 months ago but they will still have them
its a mac solenoid, but just search for MAC products and there is a place in australia that sells them, i sourced mine from a place in victoria which i found on the net, can't remember their name, they were in ringwood,
possibly these guys www.pneutech.com.au
my boost controller is one of those HYBRID 2 or 3 stage things... simple but the solenoid holds like a f*kn pitty holding a cat
i noticed the solenoid is the same as the e-boost one, and the apexi one. just got their own logos/colouring on them
so try and sus the part number out for that solenoid and you should be ok, when i shorted my solenoid out i needed to buy another one, just the actuator was faulty so i payed around $35 delivered for it...
the whole thing like i said is around $50 - $60