Hello (and sorry for the slow reply)
Yes ITG is one of my clients, but in a consultative capacity on the commercial side. I just share the same passion for cars you guys/gals have!!!!
Colin_S, Im sorry to hear youve had trouble contacting them, Ill bring this up as I know theyre extremely busy at the momenth (still no excuse though).
On the 16v/willy front......
If someone can supply me with detailed diagrams, photos and measurements I can have a panel filter made very quickly (within 2/3 days).
The maxogen system is a different matter, costs involved in "tooling-up" for a production run are more than youd believe........
Something tells me that few companies would be keen on developing anything for the earlier models, were a very resourceful bunch and Id doubt its possible for a manufacturer to recover development costs this long after the cars production finished (demand will be low). Like you said, people are now willing and capable of making DIY applications to suit their own vehicles... (I have on numerous occasions)
BUT!!! I am not defeatist, so Ill ask the question.