https://www.ebay.co.uk/str/hammerheadfabrication
Full burner sets (tubing, clips and reg + burner) can be bought here:
https://www.ebay.co.uk/itm/193412603571
Large burners here:
https://www.ebay.co.uk/itm/193766583975
Small burners here:
https://www.ebay.co.uk/itm/193407211073
Small right angle burners:
https://www.ebay.co.uk/itm/193458974271
Medium burners here:
https://www.ebay.co.uk/itm/193412604036
Medium right angle:
https://www.ebay.co.uk/itm/193458990761