85 vf500f throttle cable woes

Hey folks. Have a bit of a pickle i'm trying to work through. I've got an 85 as my post description says and I need new throttle cables. All I can seem to find is the "pull" or "a" cable. I've tried motion pro, and my local honda shop and the "b" cable is discontinued and not available. Any ideas where I could find this elusive 2nd cable? Or....is it possible to use two "a" cables? It doesn't seem visually that there is much difference other than the in line adjuster. Hit me with your ideas and experience. Thanks!

-Dahlbug