You could try Licks. I'm sure others will suggest other sources.
Basically it involves a hinge to support the front of the seat, and springs to support the rear. The hinge and the spring stantions are welded to the frame. Or were you looking for a non weld solution?
Last edited by Folkie; 21st January 2011 at 20:40..
PM'd you. I got a solution but it involves welding , very simple and cost is about 15 American dollars. I can fabricate (check me out "fabricate" ) and send you a front mount like mine and send it to you at no charge, but someone would need to weld two mounting studs for the springs on the rear. PM me back if interested....I'll also be posting a thread on this after I finsih it up this weekend.