SB-28? Not sure how the power output compares with the 30, but I think it ticks all the boxes (excepting a built-in slave trigger, I think). I removed the extra control pins in the base, leaving just the centre pin that syncs with the hot shoe and radio triggers. But you could even remove that and just use a sync cord.
Edit - checked the specs at www.mir.com.my
. The SB-28 has double the guide number for power output.