ff8 question

Is it still possible to get the blue rift upgrade for the chocobo even if your in disk 3 or I am I screwed because I am not going to get ultima for zidain and the ragnarok blade for stainer

... Zidane and Steiner are FF9 characters.

I've tried looking for you, but the search results seen to be for Grimoire of the Rift rather than FF: 9. Could you be more specific? I can't remember what the Blue rift upgrade is in the game (it's been ages since I played it), so you may be better off looking for a guide on GameFAQs that covers side-quests. That's assuming that you are talking about FF: 9 and didn't just list the wrong characters by mistake : /EDIT: I just tried searching for the upgrade that you are talking about within a few FAQs and within the FF Wiki and came up with nothing...YET ANOTHER EDIT: And it turns out the reason that I couldn't find it is because it's called the Blue Reef upgrade.
http://www.gamefaqs.com/ps/197338-final-fantasy-ix/faqs/42402 < Find what you're looking for in there.