Wouldn't be unprecedented. MMPR season 3 used Kakuranger footage and Zords but still used the Zyuranger costumes, so the Pink Ranger had a white/red Crane Zord and a white Shogun Zord. They never made any attempt to explain or justify it.
And in MMPR season 2 they used the Dairanger mecha.
There was just enough black on the the green dairanger's mecha to pass as a black lion