"bridge pickup with similar voicing to the APH-2, but maybe with a little bit more output and a bit tighter." says Slash bridge to me.
My second thought was just a straight Custom, which is voiced like a loud PAF, but has some top end and tightness via the ceramic mag.
59/Custom would be a solid choice. IME maybe that would be a little thinner/flatter than the roundness of an APH.
A '78 Model might also do the trick, but now we're moving in the more bright, tight direction.
Custom 5 is solid, but more scooped and bright than an APH for sure, IME
The Custom would indeed be tight and have more output, but it would be WAY brighter.
The 59/Custom would also sound thinner (less mids) and brighter.