Not sure on the exact cost for rebarreling, as it is dependent on the barrel machining.
Barrel machining - $45
Barrel stock by the inch - $1.50 per inch for .686 bore or $3.00 per inch for .678 bore
Soldering is Stuffy's domain, so I can not quote a price.
Porting is extra.
If you plan to use the .678 barrel, you will need a new bolt made. They run $45.
As to pictures of milling... Poke around in my Gallery
, and you can view some of the projects I have built.