I thought this was a pretty neat idea for an alternative buttonhole – whether you fancied buying it or having a go at making something similar yourself.  It uses a vintage key, which you can find at carboot sales, antique and junk shops, or online (try Etsy or Ebay).

I’m sure with not too much fiddling you could figure out a way to secure the key to the ribbon.  But if not, this is a steal at just over £10 from the talented WhichGoose.