Automated way to find actual COMMIT LSN of subxact LSN

I want to build automation to recover a database to a specific LSN
*inclusive*, even if that LSN is from a subtransaction. The problem I am
facing is that I know what specific LSN wrote a row on a remote system, but
if I create a recovery.conf file with:

recovery_target_lsn = '95F/BBA36DF8'

and 95F/BBA36DF8 is actually a subtransaction, then even if I use default
behavior of recovery_target_inclusive = true, that transaction will NOT be
included in the restore point, because it is prior to the actual COMMIT LSN
of which this lsn/subxact is a part.

My hack for now is to simply manually scan down until I find the COMMIT,
which is the only way so far I can figure to find it out. I don't want to
hack some kind of search script based on this if there is already a better
way to get this information... anyone know of a way?

Thank you,
Jeremy