I went to a local sign writers that looked good, told them what i wanted, and they pretty much designed my van for me. I think most places would do the same, quick as a flash they showed me different ideas and different fonts/styles.
If you want to get an idea of some different fonts for yourself anyway, if you have microsoft word you can select all different types of fonts, or even some web browsers email like hotmail you can do the same, will give you a bit of idea anyways.....