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Using D3DX to flip a texture along the x axis?

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Am I missing something in the D3DX docs, or is there no simple way to use D3DX to flip a texture along the x axis? I need for the pixel at 0,0 to be the lower left pixel, instead of the upper left as D3DX interprets it. I would have already written the code to do it myself, but it seems extremely unusual that D3DX would not support such a commonly needed feature.

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Just reverse the texture coords - set Tv=1-Tv on each vertex, I think.

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That would definitely give the correct coordinates, but unfortunately I have a fairly large amount of code relying on 0,0 being the lower left point so breaking the texture coordinate system would create a domino effect.

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