I wouldn't get too hung up on lure colours for flatties. Pink is supposed to be the gun colour but I don't think they will pass up anything that moves near them. I choose lure colours on the basis of water clarity and cloud cover. Dark/solid colours in turbid water, translucent/light patterns in clear water. Natural patterns when sunny, bling when cloudy.
Agree that Ecogear do a lousy job of product information. Funny thing is they seem to do local packaging, or at least used to. Might also find that the older patterns, including the one you describe, are hard to find. You are after colour 304 - Hawkesbury River 'Red Eye Killer'!
If flatties are your target it is important to have a range of lures to match the water depths that you are targeting. The poltergeists come in a range of depths, all of which are deeper than the SX. The scorpions also cover a couple of depths. Be prepared to have flatties swallow your lure and saw through the line. For this reason it can be better to drift and jig an sp for flatties or to cast and retrieve and sp for them. Most of the time you'll get your fish and keep your lure so its just a matter of judgement.
For aussie salmon, larger diving minnows are the go, like Halco Laser Pro and Rapala CD7. The red head pattern has been most consistent for me. Also pays to have a metal slug or an sp at the ready in case they are feeding on the surface - just cast to the edge of the school and rip the lure past them. The poltergeist is likely to take sambos too.