Absolutely! I have a lot of scripts from different weddings that they can look at, and create a "pick and mix" approach to what they're after.
But honestly, my role is to make things easy - so part of how I work, is making sure that I've got to the heart of what each couple wants from their ceremony, so I can then create that script for them. If they want to see samples, that's never a problem - but my hope is to nail the brief so that extra work from my couple isn't needed.