MBL Audit - Outsourced

I am looking for recommendations to send out RFPs to for an MBL Audit. We recently acquired a bank that had SBA lending, which we did not have expertise in.  I'd like to find a firm that understands and can help us evaluate our portfolio and practices in-depth.  Even if you use a third party to underwrite you loans, I'd appreciate their information as well as this expertise could be beneficial in an audit. 

Thank you!