Expateach

Hello.
I am selling paintings online. They are roughly 60cm x 80cm. The canvas is stapled to wood frames. Nothing fancy but it's okay for customers. Is there a good system to ship the frame to the customer after the canvas has been removed? I'm looking for something so the customer would received the canvas art with a frame that can be put together easily in minutes then the customer simply staples the canvas back on the frame. Shipping the painting on the frame is crazy expensive. A light weight system would also decrease costs.