I don't know her exact mix either but you can mix equal parts of meringue powder and water. I've also tried dissolving a small piece of the fondant/gumpaste I'm using in some water.
You could PM her and ask what she uses. After much trial and error, I only use the Nicholas Lodge 'glue' recipe which is a tsp of tylose powder disolved in a few Tbsp of very hot water.
I believe aine2 uses the same method that lodge uses. I sw her you Tube video on how to make it and it was just 1/4 tsp Tylose powder and 2 tbsp warm water left in the refrigerator overnight. Check this video
