I have some old stock of Screen Goo (although its not acoustically transparent). It normally sells for $225 plus tax and shipping but I could sell it for $140 all included? I'm located just north of you in Barrie Ontario.
The Screen Goo is the old Ultra Grey topcoat with the new Max Contrast base coat. Screen Goo Americas re-branded their products a few years ago. I used to have two sets but I decided to re-paint my screen with the Ultra Grey old stock and it looks fantastic.
This was my old Sanyo PLV-Z5 projector on a 110" Reference White Goo Screen. I have since replaced my projector with an Optoma HD200x so I decided to switch to the darker Ultra Grey/Max Contrast and I couldnt be happier.