You should be able to find them on eBay on a fairly regular basis. I don't see them every week to fit my 38 but I see them several times a year. I've read of people using shop-vac hose ends as defroster outlets.

Save a life, adopt a senior shelter pet.
The three main causes of blindness: Cataracts, Politics, Religion.
Name your dog Naked so you can walk Naked in the park.