Can you clarify your requirements??
Do you want an un-modified take-of barrel?? If so, you do realize that it might not time on your receiver?
I'm sure we could hook you up with something that would work... but if this is a project receiver, why not go with a new production barrel?
"I predict future happiness for Americans if they can prevent the government from wasting the labors of the people under the pretense of taking care of them." Thomas Jefferson