If you are looking for refills (not complete blades) at stores like Autozone and O'Reilly, you won't find them on the shelves. You have to ask the counter person for the "refills", as they hide them in the back (so they can sell you replacement blades for 6X the cost).

Sucks as the blades don't fit under most hoods on models with hideaway wipers.

You can take them apart as you like and swap the parts around.