Broker relationship where the broker truly works for the buyer?

Most brokers work for the seller - listing the business for them and getting paid only when a deal happens, meaning they are incentivized to help convince the buyer to buy. Same with real estate, investment banking, etc. Are there "buyside" brokers who search for the right type of business for a specific buyer and take a fee/payment directly from the buyer? Or any other setup where the broker truly works for you instead of the seller?