Two questions for the techs

[vinamg]

1. I'm not too sure how familiar you guys are with the internal parts of an air (smog) pump (94 S420). I need the "brushes" There are four pieces they look like small rectangular sticks. Is it possible to purchase a rebuilt kit or something? I am even toying around with the idea of fabricating them, but I'm not sure what material to use.
The dealer sells the pump as an assembly. I hate when they do that. I have a perfect pump (clutch, bearings, etc) except for worn out "brushes"

2. Anybody know if the rear self-leveling shocks (88 560SEL) can be taken apart?
I remember a thread in which somebody mentioned something about a repair, but I can't seem to find it. My friends car has a small leak but I didn't have time to examine it. It's his only transportation and I need to know if it can be repaired or if he needs new ones.

Thanks for any input.

Vinamg