The well-known and very popular program WinJUPOS might suit your needs. It will show any planet at its correct phase at any time & date, optionally with the unilluminated sector shown as well (in a darker colour), and one can then print or (more usefully) save the image for conversion into a template. It may be found at http://jupos.org/gh/download.htm
British Astronomical Association
Supporting amateur astronomers since 1890