I wanted a nice little whittler for myself so I bought a cheap blade and used cheap materials.
I removed the scale from the blade and rounded the spine to make it more comfortable to push with my thumb. Its brass and red fibre then just burch bark and riveted together. Its not my best work though.

Polar Whittler stacke birch 1 by alf.branch, on Flickr

Polar Whittler stacke birch 2 by alf.branch, on Flickr

Polar Whittler stacke birch 3 by alf.branch, on Flickr

Polar Whittler stacke birch 4 by alf.branch, on Flickr
I removed the scale from the blade and rounded the spine to make it more comfortable to push with my thumb. Its brass and red fibre then just burch bark and riveted together. Its not my best work though.

Polar Whittler stacke birch 1 by alf.branch, on Flickr

Polar Whittler stacke birch 2 by alf.branch, on Flickr

Polar Whittler stacke birch 3 by alf.branch, on Flickr

Polar Whittler stacke birch 4 by alf.branch, on Flickr