Thanks to 2005 Boards member JonzyYT for giving us the heads up of his sighting of the new Transformers Studio Series Wave 23 Deluxe ROTB Wheeljack in the UK.
SS-108 ROTB Wheeljack (AKA Pablo) was found and bought at Smyths Wallsend. His wave partner SS-107 Predacon Scorponok may show up soon too.
Happy hunting!