Definitely call the boutique baby shops in your area. I know I've seen it at independently owned shops. Target "might" have it in person, but I think you really need to call to check.
I hope he feels better. A nasty sinus bug has gone around my office.
ETA: I just checked Target's website and it's only sold online.
Confession - it kept popping up on our Amazon account as a suggest item. It's been showing up for about 2 yrs. Before I even knew what the thing was. My husband is so grossed out by the concept. So naturally I bought one for his stocking this Christmas.