1. We usually have them but I just sold them out. I should be getting more in the future but I'm guessing it will take a month or more.
The knife comes with a card stock sheath and this Wusthof blade guard works really well on it too:http://www.chefknivestogo.com/wu10blgu.html
2. I'll stick these on the site. Here they are:
Spine at heel: 2.3mm
Height at heel: 48.33mm
Edge length: 235.86mm
3. I love the HD Extra Tall. It's based on my Richmond Addict design and the shape is really fun to use and give you lots of knuckle clearance. I would recommend you try that one.