I have no information on part number B-68366. What is this part?
Part number B-492206 Top Assy Body Bumper is also the piece used for the A-400. However, it was made from a hard red fibre rather than a rubber product.
Part number B-402262 Roof Rail to Slat iron Bumper and B-402270 Top Bow No. 2 to Body Bumper were also used on the A-400. Poor reproductions have been made in the past but correct reproductions of these two items would be an invaluable resource for the restorer. If you make them, put me on your buying list.
For those members unfamiliar with part numbers, the prefix "B" is applicable for the B-400.