I'm tryin to find a set of vacuum piston diaphrams assemblies for at least 2 of my 4 carbs. I recently had a small fire in the air box which melted the vacuum piston I carbs 1 & 2. These are I believe vdjja Keihin carbs w/a 34.5mm venturi diameter. I've looked everywhere online for about 2weeks and find everything but that size. Is there something I'm missing, or a I looking right past them?