friend has a bunch of truck bellhousings, can see if any are available. I have one stamped steel. Do you need it for the truck style big flange or smaller bolt pattern?
For a good visual ID of the different bell housings for the flathead from 49-53 for Ford's and Mercury's go to www.flatheadv8.org/bellhousing.pdf It will explain in visual detail which are compatable and which are not.
Are talking about the "half bellhousing" that comes from the late 40's big trucks that is used to adapt a T5 to a flathead motor? This would be the part that bolts between the transmission and the cast or stamped truck bellhousing ring. I have one of these for sale and can send you a picture if you give me your email address. Price is $50 plus shipping. Call 970-330-6958 or email cbillelder@comcast.net.