Oh help! Where can I buy 6 inch curtain tape in London today?

[Makeitendnowplease]

I ordered my tape from my usual supplier so I could finish my curtains tomorrow. I’ve just opened it up to get ready and noticed that they sent me the wrong one.
Curtains need to be cleared away and up jn place tomorrow (Friday) so I’m happy to dash off somewhere tomorrow am to buy.
Does anyone know of a bricks and mortar shop where I can get high quality 6 inch pencil pleat tape? According to the website John Lewis only has 3 inches. Lots of shops I can see advertise for dressmaking rather than furnishing.
AI system Goldhawk Road, but not sure what quality will be like.
Grateful for any suggestions, thanks!

Dunelm?

The Cloth Shop on Portobello?

Ray Stitch Fabric Shop in Islington?

But tbh I worked in a fabric shop that sold furnishing fabric and the associated haberdashery for years and don't remember handling 6in pencil pleat tape very often! Could you join lengths of 3inch instead?

Thanks for those suggestions, I’ll call them tomorrow.
It wouldn’t work to sew 3 inch tape together because the pinches are too small.

John Lewis on Oxford Street?

Ignore me. Sorry just seem that you’ve tried John Lewis.

Muculloch and Wallis?

Some places to try here maybe? https://www.textileretreats.com/news/2020/2/6/londons-best-fabric-shops-and-haberdasheries

Huge thanks everyone! I think @ValBirosorted it - according to their website, Dunelm has it in stock and is easy for me to get to. I’ll keep all the other suggestions on hand just in case.

Thanks @ValBiro- tape sourced and project back on track. I might end up spending ££££££ on Dunelm garden furniture as a result!!

Haha well done! Glad to have been of help.