Unfortunately I don't know of any way to just install the update on that particular phone. At least not through conventional means.
I do believe it could "maybe" be done if one were to go through rooting the phone and using additional software to allow for the install, but personally I don't recommend doing it unless you are really confident that you won't kill the phone, and it isn't under any kind of warrantee (as that would certainly void it.
Should you feel comfortable doing this, then I suggest you post in the "Rooting, Jailbreaking & Unlocking" forum and I am sure they can help you with that.
http/www.tomsguide.com/forum/forum-117.html