Saner 3-position adjustable sway bar from first gen Ap1 S2K (and I believe fits AP2 as well, but I’m sure someone will chime in if I’m mistaken)
31.8MM (1.25″) Solid
Weight=~30 lbs
SOFT SETTING 566.0 LBS
CENTER SETTING 644.0 LBS
STIFF SETTING 739.3 LBS
with rubber bushings and mounting hardware, as well as a handy assortment of Heim Joints/end links (and one spare set of stock rear sway bar end links).
$250 all in.