I got the AeroSpring plans from InsaneK9 way back when he first posted it. I have it on my web page (
http://www.geocities.com/st0ney69/Guides/) Under files at the bottom of the page. Save your $20 and buy some more lights.

Here is a direct link-->
http://www.geocities.com/st0ney69/Files/aerospring.zip <--Just right click on that link and select 'Save Target as..'
St0ney