Need iMovie, however app store version needs updated system
I bought my mac a few years ago. I have the Snow Leopard system and love it. However, I need iMovie now and the app store says you need to have Lion or higher to use it. I don't really want to get Lion because I am so content with Snow Leopard. Is there any way for me to get the version of iMovie that works with Snow Leopard? or is my only choice, if I want iMovie, is to update my entire system? Thank you!!
MacBook Pro, Mac OS X (10.6.8)