First, let me apologise for submitting this query in the wrong section, it should of course be in the 3.5 litre part of the forum.
On my 1969 coupe the footwell carpet retaining clips are nothing like those in the original query. They are all like this:
Was the design changed during the production run?
I have the same type as yours in my 1970 Saloon. Vicious little baskets they are too! I've released most of them but they have left impossible to remove rust stains on the carpets. Didn't the club produce a batch of SS ones a few years back?
Naughty Glenn! I'll have to send them back and get him to add some springiness.
I know there are other grades of SS used in spring making Warwick but they may not be available in sheet? and whether the same grade could be punched out ("if sheet was available?") how long would the tooling last
Just had a Google 301 and 420 grade SS are spring grade in sheet form the 420 is available in annealed form so would still have to be hardened afterwards, then how stable would it be when lifted to fit the carpet? may be too brittle? it would need time and ££'s to do a few batch runs to "maybe" get the correct spring effect.