I just went to try them on, despite saying I had successfully claimed them, nope. Not there. Unlinked, relinked, logged in on a different browser claimed them again. Still not in game.
Came to make the same plea; give us some way to find sale items! A category for them would be best; it's just daft to have a notification that takes you to the store and leaves you none the wiser as to WHAT's on sale.