oh....I guess he is talking about the actual metal vents on the cab. Now that I think about it they do look like wetvac heads. Hopefully you can find someone parting out a cab.
You can check with Mike also from mikes-ca-desert-treasures on ebay. I think he may also be the same Mike offering things for sale right now in the For Sale section. His stuff is a little pricey and does take a little longer to receive but he may have them.
