As with so many things - this is something that’s been asked before … so I’ve moved your post and replies to a previous similar thread.
So sorry - I did look but obviously missed the obvious… apologies again…
THAT is BRILLIANT… I shall go get one, and it will be used… rah !!! I have many of these dotted round. Bet I can’t find one now…
I use a collar stiffener from a shirt. Rounded end and thin enought to fit .