i will not recommend you to use a joint in between CF vinyl, trust me it will not look good, have less life and apart from this rates are also on higher side just for vinyl.
try to get a single sheet.
I will suggest you to do this from professional guys. (suppose if you destroy the sheet while applying by mistake, what will you do?) if it will be done by sticker guy you do not have to worry if he has to waste 1,2 sheets while applying plus as they are masters of this job, you will get a good finished product. well, this is my opinion and if you want to do it as DIY, than all the best mate.