Pen shop at LHR T3?

Per the subject anyone know if there's a pen shop air-side in T3 (other than bics at WH Smith!). Need a nice pen.

Thx...

Here.

Link

There is a Mont Blanc store inside the Harrods 'mall', Cartier also sell pens, as does the Smytheson, Hermes too, I don't know what the duty free has, but there's something there too.

So lots of options .