Needle nose locking pliers from Harbor Freight are cheap, require zero customization and get the job done. If I was adjusting tower faucets every day I would make a custom wrench, but for a once a year job the pliers are fine. They have several sizes so you might want to grab a few and just return the ones you don't need.
the pliers i had on hand were far to big to get any turning going on. so I had to buy a tool regardless, but with my cut wrench I can get those nuts off and on very fast.
-=Jason=-