If you can't find the graments needed, you could just split a 3/8 vaccum line and use that, i have seen it done before, just put the line in a vise to hold it and take a razer knife and slit the hose. then line your cut out holes in your hood with the hose, just make it a little longer than what you think you need, better to have it longer than to short. just another possiblity.