After a few emails yesterday, I received a response from our VP of production today. Here's the scoop:
The original six styles I posted will be available with no upcharge, guaranteed shipped by 12/22.
You may have any other welt in the current active lineup made (the EC would be ordered as a First Ave) but the $125 fee will be added and the 12/22 ship date may not apply. Hope this helps some of you guys make your decisions!