A 15% premium would be far short of the price for most manufactured goods. The savings for over sees manufacturing are significantly higher than that. Particularly for labor intensive production. Try 30%-40% to break even on the additional costs including EPA, Regulations, Taxes, and increased labor costs.
The 15% was a starting point, my thinking is that they may be wiling to lower their profit margin in order to make more sales.
I know what the feeling is here, I wonder if the general consumer is willing to pay the extra cost. My gut is telling me no.