Aussie design rules are that we have a white parking light to stand out from the amber blinker.Japan don't seem to care.
There is a listing on gumtree showing two different types of adub blinkers.
As for passing a vic rwc? that depends on how observant the inspector is.It may help if you can stand conveniently in front of car,covering suspect blinker.
The last time I was at a qld transport department,they asked me which hilux was mine...there was only my hilux and a GEMINI sitting there waiting to be inspected.....they didn't know the difference between a 4x4 hilux and a small Gemini.