Dont think any of the Tri-y`s are made with a flange. Best bet would be to either get some off an old set of 4 - 1`s or make up some yourself. Usually a set or two in the Trading Post or EBAY for a reasonable price
Like Workhorse said jusy get them fitted yourself to your current set of extractors if you have some. They used commodore or falcon flanges. They are very common.
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