There really is not much available, unfortunately. I have Bilsteins and Nivomats on my 965 and that is a nice combination.

It is highly unlikely you have Nivomats. There is a designation for them in the code, but you will have to look this up or ask your friendly dealer as I do not recall it. It seems only a few cars came with this option and the special, weaker spring is NLA. The shocks and heavier 22mm sway bar are still available but you need all three for the proper suspension. Look at the shock. If it has a big rubber bellows you may have gotton lucky. No bellows and you have the standard cush-mobile version.

Monroes are reputed to be better than stock. I have not tried them yet but that is one of my next projects as I happen to agree that the V90 is a lot closer to a Custom Cruiser station wagon than any other Volvo I have owned. Too bad the aftermarket performance shocks were discontinued. Since this car was targeted towards a faily well-heeled luxury buyer, the firmer suspension probably did not sell very well to the original owners that drove back and forth to the country club.

I am sure is you google Monroe and volvo you will find a number of companies that will sell you these shocks.

Forget about fancy bushings too.

Bob
'97 V90 60K
'93 965 149K
'66 Sunbeam Tiger
'61 Bugeye Sprite