Over the years we've collected quite a few orphan power supplies, most are for some kind of music equipment.
Maybe the one you're looking for.
This one is:
DELTA ELECTRONICS AC/DC ADAPTER DPS-65VB LPS 12V ===/5.417A Max #4
ITE POWER SUPPLY
MODEL: DPS-65VB LPS
Efficiency Level:
INPUT: 100V-240V~/2.0A,50Hz- 6OHz
OUTPUT: 12V ===/5.417A Max. (+)-\