Use a nationwide directory like MyMedicareBroker.com to search for a broker by...

https://claytonnujn348.timeforchangecounselling.com/how-do-referral-commissions-work-for-medicare-brokers

Use a nationwide directory like MyMedicareBroker.com to search for a broker by state or county, then verify their National Producer Number (NPN). Before reaching out, check whether they work with Medicare Supplement, Medicare Advantage, and Part D plans.