I finally found the essence on eBay. And I do apologise to anybody out there who owns an eBay shop that sells food but... I'm always concerned. The stuff is alcohol-based, but I am convinced (only slightly reassured) by the words 'food grade' in the title. If you want the real deal, quality stuff and nice packaging you can go to Uncle Roy's which look like they are the good stuff, but with postage it was going to be £10. You understand my hesitation.
When all is said and done, you know what your getting and if you love violet (cue Mum) then you will have no problem eating one at midnight. My Mum happily took a cupcake to bed. And I do say midnight snack because her timings tend to be GMT+4. Asleep at 8 and up at 7 is the norm. Lame (also jealous).