Also, just seen your video.
Yeah, same as previous post, you have something loose, squashed, broken, cross threaded or missing up there.
There should be no clonking.
The spring should remain in both it's top and bottom seats when jacked off the ground.
The top rubbers can be squashed enough for some up and down movement, there would also a lot of sideways movement.
Google just found these. Never heard of that company but the mounts look like what we've been wanting and not really available all these years. Probably will cause added Noise, Harshness, Vibration,and it's not clear how that top moves around, if it's a rose joint, or if it's the bearing that allows the rotation, or if more parts are required, but you can adjust your camber angle and some caster angle:
http://www.compbrake.com/product/ren...ly-guaranteed/
And these, never heard of that company either:
http://www.ebay.co.uk/itm/Renault-5-...-/372062241320
New old stock? rubber from CGB:
https://www.ebay.co.uk/itm/RENAULT-5...N/160684405640