I bought some Iosso at Gander Mt. when I got my new Ultra 'cause I didn't see any JB....then a couple weeks later I was there and noticed it in a different place from the other cleaning products. I should've asked about the JB originally,,but the Iosso seemed to do alright.
If one Gander store stocks it ,,I believe most of them will,,ask for it if you don't see it. But that's only good if ya got a Gander Mt. near you too.