Has anyone had this problem

Searle evaporator, three fans, each three phase. All three motors sit on a shelf which is supported by three upright brackets. One bracket has a crack on the base plate mounting.

Swith them on and you can hear the vibration outside the room.

Do I :

1: Remove the upright bracket and try braze it with silver solder
2: Obtain a new bracket from Searle

Reason I ask, If I braze the crack will it work, or will I be serving my interests and the customers better by getting a new bracket

And will Searle supply me with this part