While the SL does allow limited azimuth adjustment, spinning the P-mount head shell is a time consuming hit or miss affair.
I think you mean 1/2" universal headshell. P-mount is a non-adjustable plug-in with no lead wires to attach. The Jelco HS-20, HS-25, and HS-30 universal 1/2" headshells all include azimuth adjustment.
The HS-20 is available in the US as the Sumiko HS12 headshell; the HS-25 is available as the LP Gear ZuPreme. The ZuPreme is the better deal---$54.95 with built-in finger lift vs. $90 for the Sumiko with a fussy finger lift that requires threading the cartridge mounting bolts through the cartidge, headshell, and finger lift.
Also, I check for and adjust for azimuth by setting a small bubble level on the top of the headshell (with stylus guard in place), loosening the hex set screw to rotate the headshell until the bubble indicates it's level, and then tightening it again.