Thanks for the link Siggy, but that profile does not fit the JessEm guide, it needs a 10mm gap, however great minds think alike and all that, I have been looking at 30 x 30 aluminium angle to bolt onto the side of the fence as I posted about three back, unfortunately there is a raised lip on the edge of the fence so it would then need two 1/4" T tracks to take the JessEm track, alternatively fix the JessEm track directly to the new angle fixed at the height of the lip and pack up the other side to suite, either solution will work, but does make the right hand side of the fence unusable, not that its used often anyway, I also had a look for plastic strip at 30 x 60 to be full height of the fence, but it is extortionately expensive, of course I could buy a new fence, but that is a bit of a drastic (expensive) step just to get the guides to fit especially as the current fence is perfectly adequate.
Mike