A possible workaround is Real Band, you can change any style into a lot different time signatures. It doesn't work every time, but I have had it work many times for me. Rharv made a song in 7/4 and sent it to me and I changed it with several different styles all 4/4 and they all worked. Check it out here is a link to that post.
http://www.pgmusic.com/forums/showflat.php?Cat=0&Number=376888&an=0&page=0#Post376888