I cannot speak for you buddy, but for me there is an emotional issue in cutting that beautiful long 45-70 barrel, I am getting all misty just thinking about it....<><....
If we could think of a way I would happy to swap a like new 22" 45-70 barrel for your Buff Classic barrel, I would even throw in a few bucks. By the way, I get to Canada every so often, I drive in by car through NE Maine. It is a shame the the laws are so tough and convoluted so as to prohibit such a simple thing as a barrel swap, just a couple of pieces of pipe really without the other parts of the gun ....<><....