Genuine Rayburn 300K Oil Fired Cooker Spares & Replacement Parts available to order online from Rangemoors. The 300K is a non-boiler version of the 308K Oil Fired Cooker. Select the part you require from the list below, including Rayburn 300K Burner Shells, Burner Base, Wick Sets, Flue Shroud, Burner Lids & more. Can’t find the Rayburn 300K spare part you’re looking for? Call / Email us for any parts not listed.