HA! I just found some ok ones here
http://www.witchstore.net/bumperstickers2.html
" Ankh if you love Isis "
" Beam me back Merlin! "
" Born again, and again, and again.."
I love this one!!!
"Cats not Kids"
I am having that if I get a car!
" Christianity has pagan DNA "
How true!
" Eve was framed! "
" Freedom of religion means
any religion "
" It's your hell, you burn in it! "
" Things haven't been the same since that house fell on my sister "