Hi, we have an NZ made 2 burner pressurised alcohol stove on our yacht; it has given sterling service for over 30 years (considering it was second hand when fitted!). We have kept it running over the years using second-hand parts cadged here and there but it is now getting 'cranky' to say the least, and the spares pile has run dry. Therefore I have been looking at replacing the burner heads and would appreciate some help determining compatible replacements. The burner heads, caps and control knobs have no identifying marks on them. The thread diameter is about 14.5mm with 9 threads over about 6.5mm, doesn't seem to be a common thread as far as I can tell. The burner is 69.5mm tall and 66mm wide at the top. Let me know if there is any particular piece of info I can provide to assist in ID'ing. My hope is that I will be able to replace them with something like these https://www.tilleylampsandstoves.com/product-page/primus-stove-regulating-burner (rejetted for alcohol obviously). Thanks in advance for your help!