i need 3d rendering and printing

I would like to combine 2 lightsabers hilts into 1. The main piece would be the Dragon handle of the Ramirez/Connor Highlander katana(Highlander Original Movie). The 2nd piece would be the activator area from the Star Wars Visions Katana(placed on the top part-spine of th Dragon head handle). I also need to have the interior of the Dragon handle to be circular and hollow(so i can fit in electronics). I do not have any files to upload. I would need to have some help with this too.