Wow...synchronicity of the universe, my 2010 Scouts started leaking this weekend the last 150 miles of a 2,000 mile trip. Riding for 2 hours in constant rain, both boots had enough water in them to slosh back and forth during accel/decel. Luckily I was on my way home, in warmer South Carolina temperatures (I had been in the New England cold) when they started leaking. I was wearing over-the-boot Gore-Tex pants, so the water didn't come in over the boot tops.
In over 40,000 miles of riding in these Scouts, this was the first "failure".
I sent an enquiry to Alpinestars yesterday as well asking about suggested options.