Letrajet Air marker

Hi, and hope someone can help me. if anyone has the letrajet air marker and has managed to work it without the adapter which I am told is no longer being sold by letrajet, that would be fab..:lol:
I recently bought a Letrajet airmarker to find the adapter which goes between the air can and the air supply valve is missing and that Letraset no longer supply it, and without the valve the air escapes rom the tin around the inside of the bigger valve:angry:. cant believe that they are continuing to sell these things or maybe there is more than one type of air can??

if anyone uses any other mini compressor or air bursh systems (Apart from copic which is a huge price) would be good to know.

thanks and am sure I am not the only one baffled by this :blink: