Professional?
https://www.remoterepairs.com.au/collec ... placementsYou can probably save a little cost by removing the shock cord down the centre of the poles (number the sections at the joints so you can get it back together in the right order). Send then both the broken bit and the section it mates to so the repair can see the repaired joint mates well.
DIY?
Try sourcing "tent pole repair sleeve' .. mont make one ...
Best to remove the shock cord down the centre of the poles (see above).
Mate the broken section with its companion. Using a hammer gently tap the broken bit back into agreement with its companion. You'll find you'll get close but the last bit will always spring back, Separate them and very gently tap it back ..
If you get a good fit then it will be a matter of strengthening the fracture. Basically add material around the outside e.g the repair sleeve, a thread wrapped around it , aluminum from a soft drink can (very thin - you can cut these with a sharp knife) .. and then use glue to hold it in place. This will always be weaker than a new pole.