I would recommend vbskin
z.com for a large selection of skins. Though I've never needed
support there, any other question I had was always promptly answered. Also for custom design I"d recommend
http://www.vbmechanic.com/ Though skin design is not their primary role, Alex is a very good designer and
very prompt and professional. I'm currently having him design my VB3 skin. He has also released one skin (VB3) for public sale,
Squareville, and as far as I know has plans to release more.