Looking for an American Flyer 45 degree crossover to fit older AF track. The newer Fastrack will not work.

There's a guy that makes these and sells them on ebay. He goes by the name of "americanflyerfan" and lives in Rochester, Michigan. He last had one listed on 3/21/15 with a starting bid of $45. It didn't sell. I think this should be enough information for you to find him on ebay and send him an email through the ebay system.
Good luck!