Thank you, Mike
And my thanks to the others who responded.
I’ve thought about getting mild steel plate the correct thickness to cut the profile but trying to form the barrel (tube) across the bottom seems like it would be a daunting task. I’ve also thought of cutting slightly oversized blanks, soldering a piece of tiny steel tubing (I believe it’s available for motorized model builders)) across the bottom, then shaping the replacement to the correct shape and size. I would need to hide the solder joint, maybe some brush-on bluing would do that.
Thanks again,
OrenT.