There's really nothing special about a bulb for heating a bubble tube in any of the bubble tube accessories by any of the manufacturers. They're common bulbs.
That said, depending on the construction and materials (e.g., plastic, metal, combination), particularly around the bulb-tube area, you will want a bulb that's hot enough at a modest voltage to create the bubbles in the tube, but not so hot as to deform/melt surrounding plastic components. Also, overheating the bulb(too high a voltage vs. its rating) will shorten its life.
I believe a #363 14-volt bayonet base bulb is the common recommendation for the postwar 455. I know there have been later versions by Lionel, and some copies by others, some of which my have a different recommended bulb size, rating, base. Here's where taking a Magic Marker or some such indelible pen and writing the bulb number on the bottom of the accessory (Why don't the manufacturers do this?......rhetorical, I know.) for future reference is a handy thing to do.
Heat transfer from the bulb to the tube is important. There is nothing wrong with the bulb and tube being in contact with each other to help with this. In fact, it was shown to me the other day that an early U.S. patent (1944, #2,353063) drawing for the bubble-tube lamp (Christmas style) shows the bulb and tube in contact with each other....not always achieved in the accessory.
Can't say for sure that one manufacturer's bubble-tube is common to another's. It's all the same technology, though. Others may have info/experience on this.
FWIW, always....
KD