The regulators will almost never provide suggestions as it would jeopardize their independence. Are you a member of any local peer groups? I would be reaching out to them or making some calls to my peers in the area that might use some local vendors that they are happy with. You might also ask your external accounting firm or any external auditing firms you already use, such as for AML/BSA, they should know who in their industry provides such audit services in your area.
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