Invader is generally regarded as having overamped low end, to point where even people who like the pickup sometimes use a high pass filter permanently wired in.
Most pickups with a ceramic magnet or A8 are likely to be contenders, depending on polepiece structure (dual rows of 0.75" allen screws tend to have reduced low end).
A lot depends on how much of which low end frequencies you are talking about? Deepest? Or highest peak somewhere in low mids or below? I'm guessing latter, in which case things like Whole Lotta Humbucker, PATB-3 Blues Saraceno and '59 are likely contenders.
A8 is likely to push output and feel in wrong direction for someone wanting vintage feel, though some do love it. I know people who still miss their Yamaha SG2000 from the 70s, because they've never found anything like it since (still haven't convinced them to try a PAFish with A8 for an approximation of the Super 70 pickup).