if you read around you will see that clownfish host just about anything if it feals right to them. Rocks, corals, anemones, heaters, thermometers, powerheads.
Hope your do what you want them too. If so, contact the manufacturer, maybe you can get some cash out of it by suggesting they user your hosting clowns as a comercial that shows there "fakes looks so real even the fish don't know"
good luck, Kevin