That is same system as DSE uses in its frames. Regular speedway splined swaybar with greaseble nylon bushings. Aluminium collar rings keep the bar centered and steel or aluminium arms bolts to the splined ends.
I have mine still in pieces - do you want me to take pics to clear it up ?
Bars :
http://www.1speedway.com/standard_swaybars.htm
Arms,collar rings and bushings:
http://www.1speedway.com/Swaybar_Arms.htm