I have a good condition airbox removed from my 2001 996tt if anyone is after one. Currently on eBay.
https://m.ebay.co.uk/itm/Porsche-996tt-air-box/282986669486?hash=item41e351e5ae:g:LV4AAOSw-W9bDZUT
https://m.ebay.co.uk/itm/Porsche-996tt-air-box/282986669486?hash=item41e351e5ae:g:LV4AAOSw-W9bDZUT