Those are "normal" humbuckers or sidewinders? I'd like to hear some samples!
I can make either one in those covers. I make neodymium humbuckers in both wide and narrow aperture, and sidewinders. I just started making neodymium sidewinders, and the first three of those were in standard HB size (but with plastic covers). I have no sound clips from this size pickup, but they sound pretty much like the other clips on my website.
Most of the people buying these have been to use in LP basses.