Small Accounting Firms Contact Research

I need detailed contact information for small, local accounting firms only—no regional or national practices. Please search publicly available sources, verify accuracy, and compile the data into a clean spreadsheet. At a minimum I expect the firm’s name and website; where you can confidently find it, add direct phone numbers, generic or direct emails, and a primary contact person. Deliver the file in Excel or Google Sheets with each data point in a separate column so I can easily sort and filter later. Cite every source or link you use in an extra column for quick reference. The research should be thorough yet efficient, focusing on quality over sheer volume. Let me know your proposed approach and an estimated turnaround time.