So I made my own a few years back and this has, slightly modified over the time, served me well - and so I offer it to anyone who might find it useful as a resource.
Here's the first and final images:
and the powerpoint file for them (and the stages between) can be found HERE
Feel free to share this with anyone you feel might benefit from it and help to support the Children's Society this Advent.
Here's a short clip to show the graphics in use:
Following a few requests I have added a simple Christingle service powerpoint file to the folder. You can find it and the component slides (and all the funeral hymns too oddly!) here