Having trouble finding one. The part number on the seal is 1404504 which cross references to a national 7216. I ordered the national seal but it’s too small.
Next I ordered what I thought was the correct item from Old Mopar parts using the mopar part number out of the parts manual but again the seal is too small.
The ID is 2 1/8 inches and the OD is 3 1/4 inches.
There was an older thread on this which listed some part numbers but I had no luck with them.
I think the national 6845 might work but I cannot locate one.