Great news! I received an email from a gentleman at PML, Inc that I had emailed a few years ago concerning making new valve covers for 348/409 engines. He contacted me the other day and included a link that I have posted below. Check it out!
http://www.yourcovers.com/newproducts.htm
Sincerely,
Matt
http://www.yourcovers.com/newproducts.htm
Sincerely,
Matt