To my best knowledge, the replay links are only available in that special moment between this and the next shot. Therefore I suspect that it's gone for good, unfortunately.
Add that there's a clock running in MP games, thus it would be best to use the "copy" button in the "share" area to make it permanent ASAP. After that, you won't be able to put it on the replay board but only share it in the blog.
Don't worry, you're gonna shoot another nice eagle here.