I've found it by googling my time line, viewing the retweet and in the top right corner there is a down arrow - click that and it reveals a menu on which is 'copy link to tweet'. Hoping that works as it's what I've done, I couldn't find any other way in the iOS app at least.
the link will stay the same with the owner status, that's not changed anything.
yeah, it will get nothing changed, the retweet link means the owner status that we've been retweeted, eventhough the link not changed.