Solex emulsion tube availibility

[GlennBurnage]

My previous Jetting post was prompted by my investigation into why I have a occasional spit back from the centre carb. when I dragged out all the easily accessable jets etc I found some differences. The biggest difference seems to be the emusion tube on the centre carb is vastly diffent from the F & R (centre marked 13 and F & R marked L24) the L24 have a row of holes (4?) down each side of the tube and the 13 only has 1 hole on one side and a few on the other. This makes me think that this may be some of the reason for the spitting back. All the other jets are pretty close (centre Main Jet -175, F & R 180. the rear has a smaller pilot jet than the F & centre - R - 44, F 7 C 55).
I ran the car in complete darkness whilst observing the distributor/HT leads etc and there was no sign of 'tracking' or wayward earthing at all.
SO, is there a supplier of emusion tubes out there?? I could find jets, repair kits etc, but not emulsion tubes.