Mother's Milks are about the same output as the Am Standard and both have A5 magnets, the difference in construction terms is that they have Plain Enamel wire, whereas the Am Standard has polysol. Oh and the Am Standards are machine would with relatively cheap internal construction such as the bobbins, etc. In terms of tone, MMs are perfect mid to late 60s pickups - think Hendrix, late 60s Harrison strat and your'e there.
From BKP's stock I would look at MM, the new unadvertised 62 set or the Irish Tours. All will get you where you want, but the best way forward would be to email or phone BKP for recommendations. I would go flat profile with the Am Standard.