I found the product !!!!
- it's called the "Ultimate Marking Pencil"
Buy Marking Pencil Online - Full Line Stencils – Full Line Stencil Store
The cost to ship to Canada from their website is prohibitive but it is available on Amazon in Canada...
I like to use this when I have a quilt on the longarm and I decide (finally) what I want to quilt - I can mark with this on an already mounted quilt where other marking pens etc won't work. I have always had good luck with it ironing off.