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
Mora 780 blade by Alf Branch, on Flickr
The broken knife and how I ground it
Broken Mora handle and reground blade by Alf Branch, on Flickr
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
Broken Mora rehandled by Alf Branch, on Flickr