Hi Darren and captj
Some bad news. Stainless F&F were purchased by DNL Fabrications in 2016.
Today (04JUL18) I contacted DNL and inquired about the Mariner Regal stoves - receptionist had no knowledge that they ever held stock or fabricated these stoves.
As for your gas stove problem, you could try The Gas Man (not sure if he is still around), but when I used him about five years ago, he was worth every cent.
Failing that, try calling John Steer and Associates in Royal Queensland Yacht Squadron - they are a maintenance
organisation and would know who the current
gas fitters are around Manly.