Hi Alex,
Found the file for your bass. Besides the build record, there is no other ownership history for this instrument.
top: Walnut
body: Mahogany
through-body neck: 3-piece Maple, 32 medium scale
fingerboard: Ebony with pearloid inlays
pickups: Alembic PJZ
controls: 2 vol 1 filter, mono output
birthday: April 22, 1988
originally made for: KCM Thailand
If you have one fret that is causing a buzz, then it's likely limited to a fret being too high. From your description of the fingerboard, it sounds likely that a fret could be too high with the board swelled up from humidity.