Not with the way component is created you need to modify the action file as per your need. If it is export its different case.

Can we just add "mobile," on the end and add mobile numbers?

Update added with fix of unavailable method

There's a nice guide on how to use the Facebook Api at
http://www.json-xls.com/how-to-export-facebook-group-members-to-excel

and a graphical Interface based on the above developed at
http://www.ls1.ifkw.uni-muenchen.de/personen/wiss_ma/keyling_till/software.html

see accompanying video tutorial
facepager:

i will import gruops from facebook in ossn