Patience is a virtue then Looks like not too many if any others have that exact same file so you may need to wait for them to come back online else for them to free up an upload slot. There's also a possibility that they are sharing a partially downloaded file & you are waiting for them to complete it from their original source.

Keep in mind searches do not reach the entire network. Otherwise (a) it would take a couple hours to get all results back & (b) having that kind of search would slow the entire network down incredibly. So perhaps you cannot reach the original person with the file directly yourself at present through your connected ultrapeers, etc.