Attached Link: http://www1.sphere.ne.jp/mizno/main_e.html

Depending on how the model is saved etc, Metasequoia has a vertice reduction feature that will take it all the way down to whatever you want. Only problem is that its non commercial and there might be model rights to consider if you use one of the poser models. The model rights you might be able to overcome with the appropriate phone calls/agreements but the Metasequoia program can only be purchased in Japan.