No such insurer, agent or adjuster may engage in any act or practice of intimidation, coercion or threat for or against any such insured or claimant to use a particular company or location to obtain automobile glass replacement or repair services or products covered, in whole or in part, by the insurance policy: Provided, That nothing contained in this article shall prohibit an insurer, agent or adjuster from entering into an agreement or arrangement with any company regarding automobile glass prices or services for the repair or replacement of automobile glass.