Bagon needed on Pokemon White?

Hey :) um its my boyfriends birthday next weekend so I've bought him pokemon black and am trading over his favourite team (as eggs) for a surprise but I really really need a bagon! I have pokemon diamond and pokemon white but I can't get one in White forest. Please could someone trade me one? I've never traded with someone I'm not in the same room as before so please give me very very basic instructions! :p I have some shinies to offer but they were all got with my brothers AR, email me or post a reply saying what you'd like in return, thanks in advance!! :D xxxxxx