Jim,
Being from the "sticks" and not often able to shop for supplies in person I tend to miss a lot of products. I've seen the odd container of "Mister" products and often see them referenced. I have Tamiya Surface Primer but assume the product you refer to is thicker and more of a gap filler? Also, what was the Tamiya Label problem you refer to? (laquer content?)
Sorry, no info, just another question to add to yours.
Cheers,
Lance