Magazine subscription - how re-install on new ipad
I have an ipad 1 and 3. On ipad1 I have sports illustrated and bought a magazine as a 1 time purchase (I am not a subscriber). I installed SI on ipad3 but not by a restore (I just re-downloaded it). On the ipad3, I do not have the magazine I bought on ipad1 and wish to get it on the ipad3 (again).
How do I get a magazine I already purchased on the ipad3 without re-purchasing it again?
Note: I went to the SI store, I see the mag, and I also see the price, so I'm reluctant to but it again for fear of being charged twice.
(PS there's not much out there on how to handle re-downloads or re-installs of already purchased media content)