If you open a sketch from one part, copy, and paste into a new part w/o opening a new sketch in the new part, I think it places the sketch into the same position.
you could also add a sketch point at the origin to the sketch you're copying and when you paste into the new part, you can move the...
Nabla, Not sure if this is what you had in mind, but using your sketches, I added a few pierce constraints and created splines between your sketches on the planes provided. I then added seperate sketches to create each endpoint and connected them all with a surface loft. Does this...