rubber seal on tail gate of 1962 Land Rover.jpg

I'm looking to replace the seal between the canopy lid and the tail gate on Betty my 1962 SWB SIIA.

I don't know the part number as my parts book only shows the one piece rear door and my workshop manual while showing the 2 piece door doesn't list part numbers.

Scott at Scott's Old Auto Rubber doesn't stock it so I'm now stumped.

Does anyone know the part number or more importantly know where I can source the seal. You can see from the photo that its definitely showing its 57 years.

Thanks for any responses.

Cheers

Nic