Bloody shame, Ive got my vent face fitted in the dash loose (Unglued with a stanley blade), till I get one.

I might consider making my own using a method shown to me by a model train engineer, using a thin sheet of brass (from a model shop) dropped in a shallow plastic bowl containing battery acid (cuts as clean as a laser).
But I'll need a laser printer to print a negative on photo paper or use one of them pens you can get from Maplins to do etching with.