If you can't find the right clamp, maybe you have a few steel shims laying around the garage you could use to close the gap enough that you could tack it.
i thought about this but the problem is if you dont get the bracket to clamp down on the bushing enough the stabalizer bar will always have room to wiggle which will wear out the bushing even faster. so thats why i needed to clamp the bracket down to the frame b4 welding.
anyway, my solution ended up being to just weld it down.
for the driver side i first used a big clamp to draw down the bracket to the frame but bc of the position of everything it left me no room to weld, so i had my brother use a prybar to force down the bracket while i welded it to the frame. (sry no pics)
for the passenger side i was able to position the clamp differently since it was the rear bolt that had snapped, i clamped it and tack welded it, then gave a little more weld after i removed the clamp. see pics below
the bushing and stabalizer bar running through it
big clamp to the left (pressure has just been released) tack weld in place, bushing bracket is tight down to frame) bolt that didnt snap is installed on the right side
one more pic just after welding
if anyone else wants to try this repair you should note that the clamp i used is much bigger than what you would typically have at home. its hard to tell from the pics but even fully closed the clamp is 12" tall. the key though, is having a clmap that is deep enough to reach the bracket and not hit the frame first.
like i said though, i nice long prybar positioned right for leverage will work too.
im really not too happy with this repair myself but i just didnt see any other better option for me...
for the record, you CAN NOT
just drive with one bolt installed!! any upward pressure on the suspension (potholes, speedbumps, etc) causes the stabilizer bar to want to push up (since it is attached to the lower strut by the end links) and the bushing bracket will bend if it not held down on the front and back. you front end will start clunking again.
However it should also be noted that if you have to drive for a little while with one bolt installed in this location you can do so as the stabilizer bar is not the most crucial part of your front suspension.