I completed all the adventures on my Titan a while ago, but now that I'm going back and filling out my collections I noticed he's missing 4 items. I tried doing the weekly heroics to see if that would grant it, but it didn't. Is there any way I can claim these items and complete my set? (Songbreaker Gauntlets, Shieldbreaker Plate, Mindbreaker Boots, Unethical Experiments Mark)