Here are two excellent options(please follow the links for detailed information and pricing):
1) Use System Three® T-88, our original structural epoxy adhesive. The viscosity is high enough so you don't need to be concerned about starving the joints.
2) Use Silvertip Gel Magic™, our non-sagging, gelled epoxy adhesive, with toughening technology to withstand increased vibration and impact resistance.
Both will form permanent structural bonds when the parts are laminated in a jig. The cured bows will still flex without cracking.