I have been advised just to do the 5hrs night command if you are going on to do CIR anyway. having a current (and that is important as if its not current then neither is your NVFR) CIR gives you NVFR priviliges anyway in the type of a/c you did the CIR in. Ie if you do a ME CIR then you can fly NVFR in both twin and single.
the extra 5 hrs dual flying to get just the NVFR seems to be a waste of money to me.