Sounds like you have been busy! I'd love to have an 07.
You should be able to pick up a .308 barrel for not too much. You may want to look around for something like a Remington 700 take-off that someone converted out and needs to get rid of. Then just get it lathed down to the right side an you're done. Heck, you may be able to get a longer barrel out of the deal too!