I've had to replace basically everything suspension wise on the GTR and it wasn't cheap but a lot of those things were more expensive than what I paid to get things done.
I think great to get all that stuff refreshed on such an old car.
My GTR is an 89 model and when I bought it in 2005 the first thing I did besides get a major service done was drop like $3k on the suspension. Well worth it but I'd just double check these prices that you have