Mr Gruffy, seems a lot of people on the internets are in the same position as you, and therefore there are a lot of DIY clone recipes for this flavour listed. They probably won't be exactly the same, but you could make up something similar yourself. Why not give it a go?
must be getting old not to have thought of asking uncle google for a copy.
I blame weight loss and fencing.
anyway, thanks ducky, any time you want an istick freebie, let me know.