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:
Requires standard 3 prong AC cord.
AC/DC ADAPTER MODEL: CP5000 (ZF120A-1205000) #21
MODEL: CP5000 (ZF120A-1205000)
INPUT: 100-240VAC 1.2A 50/60Hz
OUTPUT: 12VDC 5.0A