Most in place machining contractors have boat sample cutters, i.e.: PCI, MTI. Thielsh Eng does also. Make sure the operator is experienced using it, or the boat sample repair may be worse than the original failure mechanism. Also don't try to mount the cutter on the pipe diagonally. If you need a boat sample diagonal to the axis of the pipe, take it out with a grinder, wafer wheel, and a competent craftsman.