All quality suspension modifications would continue to use the marvelous suspension design MB put there to begin with. We have install a couple of good lowering kits that came with shortened hydraulic struts. (don't remember brands as they were customer provided)
I would presume that your real problem is that your accumulators are dead! These list for $126 a piece and not too hard to replace. The shocks last indefinitely unless you continue to drive with dead accumulators.
Owner 24 bay BSC
Bosch Master, ASE master L1
26 years MB technician