If I may suggest that End portals should simply stay put, no matter whether worldgen would have otherwise eaten them. Some sort of flag that they can't be changed by other worldgen functions or something.
I don't think there should be an item to generate end portals. If you really want an end portal, however, you can actually place one with Creative. Just make sure you're standing in the center of the frame and then, tada, End portal frame. At which point you can switch back to survival.
@Zan Zurathi: What happens if the portal frame block has an Eye already in?
If I may suggest that End portals should simply stay put, no matter whether worldgen would have otherwise eaten them. Some sort of flag that they can't be changed by other worldgen functions or something.
I don't think there should be an item to generate end portals. If you really want an end portal, however, you can actually place one with Creative. Just make sure you're standing in the center of the frame and then, tada, End portal frame. At which point you can switch back to survival.
@Zan Zurathi: What happens if the portal frame block has an Eye already in?