Boardman pump insert

[mynydd]

hi,
I have a small boardman pump. The one where you switch round a little rubber insert depending on whether you have presta or schrader valves.
This morning on my commute, whilst attempting to switch it round, I dropped it in the dark.........
Any idea where to get a new one? Have had a look online, but not sure the correct technical term for it.
Thanks

 

[Ajax Bay]

Cannibalise another pump you don't love as much.

 

[Tim Hall]

Try H alfords for Boardman pump spares.