https://www.sparesmarine.co.uk/webshop/cookers/all-plastimo-cookers/plastimo-cooker-parts-2500-3000-hob-burners/lt-plastimo-lps359-301-eco-burner-ring-auxiliary-for-2500-3000-hob-burners/
Plastimo/LP/Bainbridge LPS359-301 Eco Burner Ring Auxiliary for 2500 & 3000 Hob Burners