Is there a way? Or am I going to have to keep risking Carpal Tunnel by Item -} Shop -} Specific Shop -} Repeat Until Ready to Scream?

Don't worry, there's a solution. Go to the shop in question, and then use Quick Stock. It has a number of other features as well like moving items to your vault.

Oh, wonderful. Thank you; this will make my life a great deal simpler.

Super Shop Till Saver Achievement, here I come!