You can create a config.ucs file to export and import. I would also suggest making a copy of your bigip.conf and bigip.license files in the /config directory.
The licenses are tied to the specific devices, so you may run into some colorful issues there.
If you are going to be in a time crunch I would suggest opening up a case with F5 so that you can fully explain your plan and ask about device licenses. An ounce of prevention is worth a pound of cure.
If you can mitigate that then it should be very similar to a device RMA which is pretty quick and easy.
Nimbostratus