Came across some interesting custom Puchs:
edit April 2015- the pictures I was linking to have gone so I’ve updated the page:
Here’s a cool Puch racer! 
Ok – I just love the nose on the sidecar ! “Duna sidecars were originally designed for Hungarian Pannonia bikes, built from 1955 to 1975”
More on Duna: http://www.ostmotorrad.de/andere/pannonia/duna/