Hi Ian,

Are you still looking for a supplier of Traffolyte?
I currently use 3mm Traffolyte for the signage my company produces, but could also get hold of 1.5mm.
We order our material in in large sheets but do have the capability to cut these down to the A4 - A3 sizes that you have mentioned. We also stock various colours.

If this could be of any interest to you drop me a PM back or call me on my works number 0121 558 4411 and can discuss a little more in detail what you require.