Advise on shock absorbers.

Hi all. New here and new to owning a Jimny. Loving it so far but need some advise. I think the shock absorbers have had their day as it’s a very bouncy ride even just on roads and when I get up to 40ish I get quite a bit of judder on the steering. 
can anyone advise on shocks to buy that fit a Jimny that’s got a lifting kit and that would make for a smoother drive. Mostly road driving so something that’s quite solid I guess. 
Any help would be great! 

The "lifting kit" is going to impact your choice of shocks, so start by telling us what kit you have.

Sorry I’m going to come across like an idiot, bear with me I’m new to all this. I believe it’s a black raptor kit but I’m not sure if it’s 2” or 4” etc. is there a way of measuring the springs to know what has been fitted?

Measure the height from the hub center to the wheel arch directly above and ask someone to compare it to their gen 3 - the reason for going from the hub center is that this eliminates measurement differences caused by tire size or pressure.

Makes perfect sense. It’s 19” from hub centre to wheel arch. If someone has a gen 3 they can compare too if appreciate

A bumpy ride comes as standard on a Jimny so don't expect it to float along like a Citroen. But there are some things that can make it worse. If the lift kit is reasonably new (from memory black raptor only appeared on the Jimny market a few years ago) it's unlikely to be the shocks. One major contributor is tyre pressure, and as you have larger than standard tyres you may want to play about to see what works best for you. Logic says bigger volume tyres need lower pressure to carry the same load.