Swapping C5 key fob

[evoke]

I've ordered a shiny new key fob shell as my one is worn badly. I can open up my old one and the new one without any issues. However, the new one has a blank blade. I don't know how to transfer the blade from the old fob to the new one. Any ideas? Or should I get the blank blade key cut? If so, what information do I need to get his done?