I'd really question your pipe foreman on this one: He should immediately recommend NOT "beveling (mitering) straight pipe ends to make at simple 17 degree bend.
If he does recommend that, get a different foreman. 8<)
In field installations, this what I have done:
For a 17 degree butt welded turn, take your standard off-the-shelf 22.5 degree or 45 degree pipe elbow, lay it on a piece of plywood so the inlet end of the elbow is at the edge of the plywood. Full scale (full size) draw the arc of the elbow's centerline bend radius (1.5 nominal diameter of each pipe for long radious elbows - you ARE using long-radius elbows, right?) and the required actual outlet bend angle: 17 degrees, 31, 28.5, or what ever.
Where the two intersect (where the required angle intersects the centerline bend arc) is where you cut the elbow. Finish your 37 degree weld prep on the newly cut elbow and you're ready to continue.
Don't miter: It creates bad welds, bad pressure drops, inflexible pipes, and future leaks. The "bend" should be in the elbow, not the pipe.
Outside contractor bending is possible, but you will likely find it too expensive, and too long for your scedule: it will take a long time for loading, shipping, unloading, bending, re-shipping. Add in re-unloading crane delays, etc. Front office contract delays.