After nearly 40 years, memory fades a bit, but I think Ford made it's version of a scattershield in cast steel. Seems like I saw one in a friend's shop. No guesses on casting # though.
Frankly other than as a curiosity piece, I wouldn't spend a lot of time looking for one. You are far safer with a modern steel bellhousing. I actually don't ever recall seing any kind of cast bellhousing on an FE in a Cobra...real or replica. Sure as heck though, someone on this site will pop up with one in their car.....
Al