If one goes you really need to replace the lot so everything balances, ideally but that would end up being about $2 - 2.5K, first off I would measure form the centre of the front hub to the bottom of the guard, both sides, the base line is 490mm, of course thats new on the wharf, I reckon if its under 460mm replace them, shocks and springs...
Problem is if you want to go OE then its going to cost you probably more than after market and really a bit of lift isn't that bad but replacing front and rear is a must ...
I don't do any off road stuff nowadays just dirt roads but my lift has improved the whole vehicle in ride and handling...I went Ironman, cost and I could keep the Nivomat rear shocks using a spacer and just replacing the springs but my other choice would be Blue Max, Donaldson or OME ... Can't fault the Ironman service as I had a dodgy set of springs and replaced them instantly.... and as someone on here recently found getting a bog standard shock is not easy but a costly item from US.
The best thing I found about the Ironman front struts was they are in 2 pieces, cut the yoke of the original strut and the 2 bits of the Ironman strut screw together, meaning you don't have to pull the axle/hub and its underlying problems with the stupid hub nut.... If you DiY you get the strut built before delivery, you would never do it yourself unless with a HD spring compressor or 10 ton press.... been there.
Keeping the cost down I would go to a steering shop, I like places that do Fulcrum gear myself, found the BLue Max shocks from SSA to be very good stuff as keeping the OE springs if they haven't sagged too much and just replacing the shocks might be possible.....
https://ssa.com.au/ but use a suspension shop not a dealer.