Yeah as Nick said... not sure why someone would say the BD didn't fit. The Baja Designs lights come with a bracket for the lights that you use to bolt onto almost anything.
Looking at this, you'd just put the BD lights on here using the included mounting brackets from BD. Maybe the XL models would not fit as they are larger but surely the Squadron series would work great on there.
I'd go with the Squadron Pros (unless we know the XL can fit). You should be able to fit 5 of them up there without any issues.
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I think what the other post may be refering to is the powered actuator perhaps which retracts the lights. Since that actuator pivots the lights out of the way, similar to the ADD bars. Again, the XL might be too large/tall so they probably hit the rear bar as they pivot down. But your Squadron series should fit just fine.
An S8 bar out to fit in there just fine as well since it's slim. I don't think an OnX6 would fit, those are kind of big. the LP9 DEFINITELY will not work with the actuator, too large. But a few LP9 would work (although LP9 on the roof I would not recommend, that's a big ole light and you'll get some drag/wind noise) but mannnnnnnnnn you'd look mean with LP9's on the roof