After 20 years os so; the suspension components on these are typically worn out and are in of replacement, resulting in a "rough ride".
For struts and shocks; Sachs was typically the oem for vw and many others, prefer Bilstein, believing them to be higher quality.
The various shock/strut mounts and front end suspension parts; typically, all need replaced. You can get a "install kit" for the shock/struts or just get a suspension "refresh kit", which replaces everything in one go and tends to produce the best results, then finish it off with a alignment. For suspension refresh kits; there are lots of cheap Chinese no name brand junk being sold on ebay/amazon, for low prices; stick with oem German brands like Lemforder, for quality parts that perform well and last.
FCPEuro, sells quality oem parts and have a lifetime warranty, on everything they sell. Some places like ecstuning, will sneak in poor quality aftermarket parts in their kits; to make them less expensive (junk, bottom of the barrel brands like URO or Hamburg Technic). Stay away from these brands; they have a long history of poor quality and premature failure, documented all over the web, on forums.
FCPEuro suspension parts:
Volkswagen Beetle Suspension parts online. Buy OEM & Genuine parts with a Lifetime Warranty, Free Shipping and Unlimited 365 Day Returns.
www.fcpeuro.com