I've never used it, but I have a good foot stretch which may help you:
The sofa stretch - put your feet under the edge of your sofa(couch) and try to straighten your legs. - I've found this works really well and I have no need for any products.
The foot stretch is great. I and several of my friends and students use it. It is a tool for a lifetime. You not only increase the ability of your foot to point, but it can help your turnout and extension, and includes a leaflet showing ways you can use it to stretch your legs as well. It is worth the investment.