I appear to have found a source for the 19mm (3/4") answer to my prayers... Addco rules rear sway bars. all the cars I've put them on ( 64 VW Beetle, 66 VW bus, 89 Civic hatch, 78 Cadillac DeVille ) have turned into monster drivers with that mod alone... they just go wherever you point them and let your seat transmit any side loads without annoying commentary from the body roll beotch.(Full Disclosure: the Civic sway bar was NOT by Addco) Even the VW bus,"Fafner", with the aerodynamics of a Meatloaf, managed to morph into a WW2 Heinkel 111 bomber with fighter-like manuverability and absolute confidence in abrupt or extreme control imputs...