8 1/4 or larger A-body BBP axle needed around CA/NV

About to dive in and put 4.5/BBP disc brakes on my new little ‘65 barracuda, figure I might as well knock out the rear axle swap while I’m under there. That 7.25 SBP is just too spindly for my needs.

Looking for a 8 1/4 or larger A body axle with 4.5 inch bolt pattern, gears somewhere around 3.23 and sure grip. I plan on doing some light towing with this car.

i’m in Northern California, happy to drive a state or 2 for the right axle thanks!