I have a spitfire and one of the seals has gone and it's a bit of a odd one, it's a flat seal not a o ring and don't even know what to call it to try and get another! Pics below of said seal.



It looks to be 9x3x3mm
It's the one off the fill level probe so it was easy to get out.
Any ideas as to what to call it or wether one could be made up? It's annoyingly just a shade bigger than a co2 bulb seal which would have been perfect if a bit thicker.