One way to do it is to buy multiple copies of the game yourself and "friend" yourself. Not ideal, but it's what I did for WoW to get the recuit a friend mounts since all my friends and family already played.

https://www.reddit.com/r/ffxiv/comments/3ab4ai/twintania_mount_is_recruit_a_friend_exclusive/

Check in there someone already suggested that. Wait for ARR to go on sale and buy what you need.