Notwithstanding Section 20301, the board may direct the purchase of any supply, equipment, or material without observance of any provision requiring contracts, bids, or notice upon a finding by a vote of two-thirds of all its members of the board that there is only a single source of procurement therefor and that the purchase is for the sole purpose of duplicating or replacing supply, equipment, or material, as the case may be, in use.
Ca. Pub. Cont. Code § 20304