turn signal flasher

Having trouble with my 1991 Pontiac Bonneville LE turn signals. They just stopped working. The hazards work so does not appear to be any bulbs. Tried the fuse and no luck. Assuming it is the turn signal flasher. Bought one but cannot find anything that is the same anywhere under the steering column or dashboard. Only piece that looks similar is longer and on a bracket. Tried several parts stores and they all indicate that I have purchased the right flasher. Any help from anyone would be greatly appreciated!

IIRC, the turn signal flasher is mounted by a clip on the back side of the black plastic panel, near the fuse block.