Pearly gates, custom V, Duncan Distortion and Invader?
Do any Duncans use mismatched coils? Since that is the most distinguishing characteristic of Burstbuckers (1, 2, 3, and V/Pro), those would be the ones most like BBs. Fralin makes the Unbucker if SD does not make anything similar.
the custom/59 hybrid i heard didnt sound much like a bb at all.
if you like gibson pups, just buy a gibson pup
What the question should be is: 'What PU's will give me the sounds I want for my style of music?"
I understand the OPs point though - he may love certain Gibson pickups, but we all know they cost a LOT more new and used than Duncans or Dimarzios. So it makes sense to look for a similar alternative.
Then buy them used, like many of us have done.
Maybe its different over there, but in the UK, used Gibson pickups cost double what used Duncans do.