I understand you concerns, but I believe no copyright has been violated and I've not even noticed the similarities until you pointed them out (and I've always admired Soness). None-the-less, this is the only 'similar' design to any of his mass marketed previous works and I apologise and assure you this is a rare case. I agree it's a little too close for comfort, but I also think they're different enough for us to continue retail of this skin.
I understand you protecting your brand, I think most people would do the same