I΄ve scraped together the part numbers for the tail light vents for all kind of 5th gen Celicas. Even as they΄re not available at US dealer ships they may be useful to order them from outside the US so I΄ll thought to post them here:
Right hand, hatchback, pre facelift: 62951-20230
Left hand, hatchback, pre facelift: 62952-20230
Right hand, hatchback, post facelift: 62951-20250
Left hand, hatchback, post facelift: 62952-20210
Right hand, coupe+convertible, pre facelift: 62951-20220
Left hand, coupe+convertible, pre facelift: 62952-20220
Right hand, coupe+convertible, post facelift: 62951-20260
Left hand, coupe+convertible, post facelift: 62952-20240