In Karachi there is a place that refurbishes shock absorbers with very very good quality craftmanship only if the damper rod is in good shape and the whole assy is not bent, they will make new valves, have their own custom twin lip 4 spring seal, their own custom locknut, you can have them adjust to any spec, sport, comfort or original.
Ive used their services and they are very good IMO, repaired 2000 MY Mitsu Galant shocks, all sorts of corolla shocks, my VW Golf units, MB units and a lot of motorcycle front units - the guys know what theyre doing and use the best of tools.
btw their refurb units are not simple oil filled units - they are gas units. Gas shocks are also filled with oil (they have the appropriate oils for all types)