Daymotorsports.com have a lot of options for piecing together a Coilover. What year is your super Beetle? If it is a 74 and newer, I would suggest just buying coilovers. Most people don't know that the lower 2 bolt strut offered on the 74-79 supers are the same strut as a vw mk1 rabbit (75-84). I'm running the same exact strut in mine offered from Raceland. You can even buy just the front 2 struts if you buy them for a vw rabbit pickup (vw caddy) cause they have struts up front and leaf Springs out back. The spring rates are of course very stiff, but I'm fine with them as Im setting mine up for track/ Canyon use. But if you want a softer spring rate, you can use daymotorsports.com to get a softer spring rate. Hope this helps. Here's a direct link for the coilovers I have.
http://www.racelandus.com/coilovers/...lover-kit.html