So, I've got a recurring issue on 1&2 carbs. Once in awhile a black flake will clog either of their seats and fuel will overflow. It took awhile to isolate it, but now it seems that it HAS to be the plastic tee on that side is shedding material. I don't know why it'd just be one, as they're both 40 years old, but I'd just as soon put new ones in that aren't plastic. Do they exist?