I designed and built a double triangulated 4 link with bags on my 66 L60. It is all custom I could not find anything premade that was big enough except the 1 1/4" heim joints and the airbags. Heres some pics.

http://lamebot.com/Progress/2012-11-10_16-15-14_608.jpg
http://lamebot.com/Progress/2012-11-10_16-14-59_126.jpg
http://lamebot.com/Progress/2012-11-05_17-50-05_422.jpg