has anybody able to rejuvenate one of these?

[SD300]

namely the guide rod mount, it first started as clunk when driving over speed bump, when she got worse it can oscillate when u brake partly, if u brake harder it will stop vibrating.
Anyways it would be interesting to know if anybody had this re-juvenate them. It sells for $100 but when your car is getting old every 100 u need to be counting them or else u have a sunk 2000 into a car that only worth 200!