Its $82 a box here...
I know your pain very well. I had a 1" binder of materials that I brought with me to over 15 vets here in town trying to procure the product. The best I could get was that I would have to completely infect my tank with red bugs, because using Interceptor as a preventative is illogical (per the vet...), and the in-home visit would cost me $600CDN, with no promise of a prescription. The standard excuse was that it was an off-label use and that they didn't want to loose their license. I've offered to sign legal forms, even to pay to have them drawn up. No luck here though, and its really unfortunate.