Fuses in non-TnA engines?

They use this rather fragile boxy looking coupling. I believe its also used on a few non-Thomas Plarail trains, maybe one of the remote controlled ones?

I've never found a good exact replacement, I usually super glue the original back together. I would probably go with the wider boxier couplings meant for tender drive engines if trying to replace them with something still available.
https://www.ebay.co.uk/itm/371235819495

Or, even easier to get, the replacement couplings for the normal tender engines, but I'm not sure if the coupling would then be too short to allow the full range of motion