Per a suggestion from OzFormers, I can confirm SS56 Shockwave is on shelves at BigW. Sighted at North Lakes: Also about a half-dozen Sky Lynxes at Myer North Lakes for anyone still chasing. Not pictured, but the website had them listed as $120 when they were still up there (have since been removed). A lot of Astrotrains scattered about, too, though I don't recall where exactly - some Earthrise packaging, some Siege. There was also an SS86 Jazz at North Lakes' BigW, but he came home with me. No other such sightings.