Ordered some goodies from ASK last week(lead wires) and stopped shy of ordering the Velorex…
I’ve seen many being driven around in my childhood.In PR of Bulgaria they were only sold to amputees and had different rigging for missing hand or foot.
One Jawa Veloreks (this was their designation here back then) won the Best Prize in an Oldtimer Show in Haskovo some time ago:
I need to buy this kit!
Edit: I bought this kit! 
Cheers,
Angel