All of the vendors carry them in some form, Hall and Precision Pro-formance are basically the same with an adjustable insert that bolts to the two lower A-arm mounts either side. Combine that with their upgraded upper camber bar (that has a second lower cross brace) and it should be good for the most spirited road driving. Larry Stock has a unique version developed from his Nevada Open Road Racing which is a cross brace that ties the lower engine mounting points to the opposite rearmost a-arm mount. I have Larry's unit, not as bling but I believe more functional. Larry drives 'Red' hard in ORR's and on track and has no stress cracks ro deck lid paint chips.
There was a recent post discussing this and the benefits (or not) of the front upper brace.