You can easily make your own upside-down planter, using any container that has a hole in the bottom that you can fit your plant through originally and can be hung up. Cut a piece of stiff gardening fabric to the size of the bottom, cut a 1" or so "X" in the center so it won't bind of the plant stem and then I also make one cut all the way out to the edge. That way I can open the sheet around the plant stem and not sit there trying to force it through the hole. The sheet just helps keep dirt from coming out the bottom. Fill up with potting soil and you are off an running.
Just remember to water almost daily. They dry out much faster than regular pots.
Strawberries need lots of little plants, just like the ceramic planters designed for them, so I would try to find a hanging planter I could do the same thing with.
Don't forget those open-wire containers with moss linings. Easily modified for hanging veggies.