Kobura,
If you wanted a reasonable priced adjustable, Koni has some.
Externally 50/50 single adjustable (rebound and compression both adjusted at same time) These give roughly 100% increased dampening over Stock when at Max settings.
Front externally adjustable (via knob while installed) 50/50 dampening. PN 86411048Sport
https://www.ecstuning.com/b-koni-par...86411048sport/
For the rear they're adjustable but require full compression and turning the body to change dampening. 50/50/dampening. PN 80-2149
https://www.lmperformance.com/709063...hock-rear.html