I'm afraid this is not possible. However the like buttons can be filled in with any url you want. You could in fact have a like button for http://www.mypage.com on your https://www.mypage.com
<div class="fb-like" data-href="http://www.mypage.com" data-send="true" data-width="450" data-show-faces="true"></div>
You would still be collecting likes for the old url, but no one would know the difference.