What needs doing to them?
New bushes & sleeves can be fitted without dismantling the shocks. Taking them apart is a DIY job and when apart you can have the upper shrouds painted and the lower ones re-chromed. The only thing you can't do yourself is rebuild the damper but there are plenty of suspension specialists who rebuild shocks who could do that for you (at a cost).
Personally I am just sticking to the bushes, & shrouds as with my weight the dampening effect is next to non-existant anway. I intend increasing the pre-load though, just need to find a suitable spacer or machine one up.