Update 2013-11-12
I've added Bearing with spring package
you have to glue them on
The sides redesigned so it's easier to put together without breaking.
Couplers arm modified for attachment without screw.
And it is positioned lower.
This updated bogie is made for 3mm axle.
The wheels need to be drilled with 3mm drill
No screws. The parts put together with "snap" strongholds
Axle box, I glued with acetone.
Pic nr2 The parts mounted to a complete pair
This bogie is made for garden railway. The 1:32 scale.
But it could probably work for LGB which is in scale 1:22.

The gauge is the same, 45 mm
The wheels can be found at.
http://www.thingiverse.com/thing:36538
wheel axles 5mm steel
Spoke wheels with 3mm shaft hole.
Uploaded with courtesy of / barspin./