can rebuilt/refurbish absorbers?

[otrolif]

Hi guys,
i had a bilstein absorber in my e46 which i think is wearing off already.
i've heard about places where i can rebuilt/refurbish absorbers...however usually adjustables can only be done. any ideas?

 

[JINEIL2EN]

...usually, mostly non adjustable can malaysian bikin only...
as for soft/hard adjustable, after bikin, become non adjustable...