Since I'm in HK this weekend I might as well try my luck in Tsim Sha Tsui and Mongkok. Checked multiple branches from Wing Shing, Broadway and Fortress. Finally I managed to find one unit from Fortress in Mongkok this afternoon. Was really damn lucky. It was the only piece they restocked today they say. I was even expecting the salesperson to make a mistake. Paid HK$2,390, which was close to S$400. They also helped me with the tourist local warranty. On a side note, 55-210 and cz 24mm no stock there.