Basically, no, you can’t bypass the brokerage. Brokers fall under the Real Estate Act (2008), which requires them to be licensed salespeople, and to work under the supervision of a licensed real estate agent. The licensed agent is part of the brokerage (often an owner). A broker therefore cannot act independently.
The essential definition of a broker is someone who acts on behalf of a vendor, and is paid a success fee, this fee being linked by a formula to the sale price achieved (this is a bit of a simplification, but illustrates my point). Anyone acting in this capacity (other than a lawyer) must be licensed under the Real Estate Act (2008).
Other professionals can work with you on the sale of your business (in addition to or instead of a broker) as long as they do not charge a success-based percentage fee. Accountants, for example, may do this. Similarly M&A advisors can also assist you to sell. The fee structure of accountants and M&A specialists is quite different from brokers. And you always have the option of trying to sell your business yourself.
Don’t focus on the commission; focus on the outcome – getting your business sold. If you want to sell, using a broker is typically the best was to go.