I'm going to try this company.
https://www.blockleytyre.com/
Blockley Tubes
Blockley Superior inner tubes are sized correctly, thicker, and made from the best inner tube material, butyl. We know that there is no better range of tubes available anywhere in the world, and because we sell direct (and not via the Classic tyre wholesaler resellers) we can supply the very best for little or no more than anything else these outfits offer.
Best
Charley
https://www.blockleytyre.com/
Blockley Tubes
Blockley Superior inner tubes are sized correctly, thicker, and made from the best inner tube material, butyl. We know that there is no better range of tubes available anywhere in the world, and because we sell direct (and not via the Classic tyre wholesaler resellers) we can supply the very best for little or no more than anything else these outfits offer.
Best
Charley