I am another great half pen advocate and one who has used (reusable) NovoRapid pens for 20 years which dispense half units.
The same pens can be used for Levemir.
While they have been updated in the last 20 years, they definitely still exist.
@Woodywoodpecker if you are not using reusable pens today, I highly recommend them - they are more robust, have a reminder of your last dose on them, dispense half units, the cartridges take up less space in your fridge and they are better for the environment. Plus you have more flexibility if
the current FlexPen shortages extends to NovoRapid.
If/when you request the NovoPen Echo, make sure you get a spare - they can fail so you need a back up.