In the 90's Kadee was split up into two independent companies:

Kadee for te H0 and larger scales
Microtrains for the N ( H0n3) and smaller scales.

I use microtrains kadee's successfully on my H0e feldbahn material.
See one of the narrowgauge loco photo's in Jacq's layout as seen by the public 1 .

Try to get the assembled version and not the kits as you need a watchmakers licence to assemble them functionally.
check via one of the searchmachines or go direct to the website.
http://www.micro-trains.com

regards Jacq