There has been some chat on the TR7/8 list about the fresh air vents fitted on some cars in warmer climates. They seem like a good idea and are a relatively easy retro fit but are totally NLA.
Ted Schumacher does some stainless reproductions which he sells at $104.94 (about £63.75) plus postage. Just wondering if I might try some.
Russ
1980 TR7 Sprint DHC
Dursley
UK
http://tr7russ.blogspot.co.uk/