B18 with dual HS6 carbs and the metal fuel line has a little rubber bushing where line runs up to above the manifold. Part # seems to be 665335-6 per my old parts book. It is getting crusty and I plan to rebuild the carbs soon, and don’t thing the rubber will survive removal. I don’t see that item listed in any of the usual places. I assume there is a generic equivalent at the hardware store, but thought I’d ask if anyone knows who has the right part I can buy.