Doug,
A source I would check and not mentioned above is Armando's Racing
Oil Pans in the LA area. Check his web site out at
aroilpans@aol.com. Armando worked for Avaid for years and is well a customed to working on Ford pans.
When I needed a pan for a Daytona Coupe, which he lists, he said he had one in stock for immediate delivery. He asked me some questions about the engine and I told him I was running a Canton main stud girdle, he said the top of the pan would have to be a little different than if I were not using the stud girdle. So he would have to make one up for me to handle the Canton piece. This attention to detail is part of his service. Just a thought.
bkozlow