[Ron Ramirez]

Yes, on models such as most 1932-1938 Philcos, they did not use cardboard to cover the entire can - just enough to keep the body of the capacitor can from making electrical contact with the clamp holding it to the chassis, or from the chassis itself. So it should not matter if the replacement cardboard tube you use is not 100% aesthetically pleasing, since it will be mostly hidden by the clamp anyway.