Big Sway Bar Options?

Hey guys, long time no chat.
Well I'm back into auto crossing and have been competitive locally in the new scca class called CAM(Classic american muscle). I had to fight to move the cutoff year to 78 and everyone forced me to add ballast up to the 3000 lb minimum (was 2870) . So to get better I have been fiddling with my car and was curious how a thicker front sway bar would change things. I currently have the stock 1" bar my cobra came with. I looked around and have only found companies(PST, Andys, MustangUnl) selling the 1"(addco's) as the largest size. I have found a few lucky people who got a 1 1/8" in the distant past. Anyone know where I could get one, have one made or use something for another application. Seems the foxbodies have all kinds of options (1, 1 1/8, 1 1/4, 1 5/16, 1 3/8). Anybody know how different they are? I'm thinking the frame mounts may be set too wide to work on a II.

Another area to work for better front stiffness could be the front springs. I am running the stock V8 front springs cut down 2 inches. Any suggestions on what rate those are and what rates I could try? Any help or tips are welcomed.

thanks,
Alcino

Thanks for the help everyone. Made a lot of disappointing calls yesterday to various swaybar places. Not really surprised by this but I did get email back from carolinaswaybar.com(refered by Addco). They said they can make a bigger sway bar if I provide mine for a template for $250 hardware included powder coated black. Seems like a good deal for a one off. I can't sacrifice losing my swaybar in the thick of autocross season so it may have to wait. I saw some images of Fox bars and I don't think they will work at all. I think for now I will deal with what I have and pop under some cars with a tape measure to see if anything popular gets close to fitting.