The one piece I'm missing from all three of my 350 fours is the rubber boot that connects the Air Cleaner to the Carbs. I have scoured the web, and have found nobody retailing this part. I found a used set on eBay, but I was too slow. I know some people have used pod filters instead, but I can't find a definitive ruling on the size (and length) of the filters. Can anyone assure me of a certain model working?