Filament wound vinylester/S-glass tube batten, 13.0mm OD, 10.5mm ID, with rod end and ferrule and aluminum ring. Priced by the meter, but available in any length up to 215 cm. Can be cut and prepared to your exact required length for easy tube replacement.
This method of tube batten replacement assumes that you are able to salvage and re-use the tapered rod tip batten and plastic coupling ferrule.
Detailed batten replacement Instructions here