There is only 1 commercially available system for trad Morgans and that is the Suspension Supplies (ex Suplex) 5L rear . This comes as a complete kit with all the parts you need to convert the rear suspension from leaf springs with forward facing dampers , to coil-over-dampers, it has all the links.
http://www.suspensionsupplies.co.uk/products/4593177137Peter (Gambalunga on here) runs with this system and is very pleased with it, another Peter uses it in Ireland (and I think Irish roads are probably as bad as Norwegian roads in the summer) and is also very happy. Look for old postings under the heading Suplex 5L
This is not a cheap job, but everything is engineered to fit and could be done by a very competent home mechanic with good facilities.
The somewhat similar system the factory uses on its race cars and the ARP4 is not available as a retro fit kit, and there is a decrease in ground clearance due to parts protruding below the bottom chassis rail.
