Hi Ewan
My parts book give this number for these: 7700650697.
This company (I've never ordered from them) lists them:
https://www.all4renault.com/products/a7700650697-kit-tampas-para-frisos-largos-cinzentos/
Closer to home, you could try this:
https://www.allcarpartsfast.co.uk/renault/renault-7700650697-plug-4/
They have a habit of advertising parts they don't have, but are worth a try. The contact there, Mike, is friendly, and I'm sure he'll be be able to double-check that the number is correct, and to point you in the right direction.