how to copy function group from a different system ?

I have a function group in a system A

I want to create exactly same function group in system B

when i am manually copying every function module, I see that in original function group there are too many includes that are standard reports

so i found the std function group which has all these reports so i copied it in system B and started to make changes to make is like the function group i want. here i assumed that the function group in system A was originally made by copying the std function group

but there are still many includes starting with LZ........... which are in A and i cant create them in B

can anybody advice how can i make exact replica of the function group ?

thank you in advance.