Van?s told me that my -9 is one of about ten they have sold and, "it was a waste of engineering effort."
It seems like the -10 would have even fewer takers than the -9. You would have better luck wishing for a -10RG which would have a bigger market but knowing how Van doesn't like the complexity, weight, and cost of an RG for just a few knots gain I don't see that coming either.