Can anyone tell me where I can find a new shroud for a 68SS 396. I have looked through the catalogs I have, but can't find one for a 68. Will a shroud for another year or even another chevy work? The car is not original. I show it on occasions, so I'm looking for something new not used. I tried one of those chrome ring types, but it doesn't pull enough air through. It needs to be as efficient as possible here in the summer heat of New Mexico. thanks for any help.