change the Defender rear coils

Rear coils of Defender is very hard and not shrink.
It cannot be said that the ride comfort is good.
Because, Defender is a work horse vehicle.

I think that there are many users who want to change this into soft
ride comfort.
Many users have the same demand in Japan.

And it is the thing which the cheapest method that they found changes
for rear coil of Toyota Land Cruiser 80.

The rear coil of land cruiser 80 circulates for several thousand yen =
dozens of dollars. It is net auction mainly.