Aqua Mesh seems to be another name for Vilene. Hmmmmm... I didn't realize that Vilene shouldn't be ironed. However, I think finger-pressing the seams would be enough for scrappy blocks -- maybe use one of those wooden things to finger-press.
I did find this website which seems to explain some of the dissolving stabilizers better:
http://www.generations-quilt-pattern...tabilizer.html
And I looked up Paper Solvy on Amazon. That might be the best as I assume it can take some heat, but the size isn't really what I was looking for:
http://www.amazon.com/Sulky-Soluble-...dp/B000WMAMZE/