I checked my collection of plants I made earlier for Vue, and that are in both *.fbx and *.obj file formats. I have five red rhododendron shrubs, three white rhododendron shrubs and two purple (sort of purplish pink flowers) rhododendron shrubs. I have a bunch of both red and white azalea plants of many sizes, and these I can create all day long. (and, alternatively, make some for potted plant versions.) And, finally, I have one decent azalea bonsai.

Are these what you are looking for?