[s]That could be done via scripting in Opus 11 Beta, but we don't have an example script that we can provide for it yet.
In a somewhat kludgey way, it could also be done by (ab)using Rename Scripts in Opus 10, which is how something similar (but not identical) is being done in these threads:
[ul][li]Copy Timestamp from file A to files B, C, D (has a Rename script and some discussion)[/li]
[li]Copy/paste timestamps and apply them to selected? (has the same Rename script as above, in a way that's easier to find)[/li]
[li]Idea: Get file date in file-attributes and -times editor.. (mostly just links to the other two threads, but I've listed it here in case anything useful is added to it in future, since it's an ongoing thread at the moment)[/li][/ul][/s]
Scratch all that. See Jon's reply below.