Contingency Fee-Based Representation for CPA Malpractice Case

I have a CPA malpractice issue where the CPA established a corporation for me but later began communicating with my former associate regarding all financial matters related to my business without my consent. I later discovered that none of the sales taxes had been paid, leaving me with a tax liability of over $150,000. Additionally, the CPA attempted to transfer my shares to my former associate without my knowledge and changed the registered agent name on the government website without my authorization. Initially, I hired an attorney who was willing to take the case on a contingency fee basis, but they informed me that I need to find an attorney in New York, where the CPA resides or conducts business. My attorney has assessed my damages at over $500,000, so I am looking for a contingency fee-based lawyer in New York to take on this case.