If worst comes to worst and the leak persists, NAPA has fuel injection hose clamps in a ton of sizes. I use them all the time and they are much more effective then a regular style hose clamp. You have to tell them specifically you want a fuel injection clamp. If all else fails, go to your local car dealership (any make vehicle) and tell them you want a plastic "click lock" clamp for a 3/16 outside diameter hose. They should have one or be able to order one for you. If the parts dept. guy is even remotely helpful, he'll find it.
PM