GM B-Body Suspension

[ElkySS89]

I've got a 1972 Pontiac Grandville (Bonneville) and I'm looking to improve the handling a bit. I knownits never going to be a racecar, I'm just trying to modernize it a bit. That being said, the factory swaybar is tiny for a car this size. Does anyone know if there's a bigger sway bar I could use? Maybe from a different vehicle? The only one I can find is the QA1 and its $430