The length of the short tang is sufficient in a wood handle.
More places sell Morakniv knifes than Morakniv blades only in UK I assume? Builders supplies shops, do they sell them?
In Scandinavia you can get the knives everywhere. Petrol stations. Many supermarkets.
You can get knives on some high streets
Here is my No1 with a 780 blade

The broken knife and how I ground it

This is the knife I made in the middle it is rather basic but it was done for my scouts the knife already belonged to the group
