I modified a Chevy truck front bar for my 70 Charger. The 70-72 B body K member has the sway bar passing through the K like the 73-76 A body cars. My bar is 1.25" solid and came from a 73-87 Chevy 3/4 ton or 1 ton 2wd. I just had to shorten the ends and drill to mount end links.
$20 or so for the bar and $15 for a guy to drill the holes for the end links.