Yeah, no dual status DB's. But there's a dual-attribute blade for every status effect.
It goes Water/Sleep, Blast/Dragon, Paralysis/Ice and Fire/Poison.
You get the Water/Sleep one with Plesioth parts, Blast/Dragon with Crimson Fatalis, Para/Ice with Yamatsukami and I think the Fire/Poison one is with Rathian parts.
I own all of those except for the last one, Para/Ice is extremely useful.