Window mount for roller blinds / roller shades

It's the part you put on the window frame and it holds the rest on the roller blinds on that window. Mine got knocked out and broken by the damn cats eating thru the plants and I tought it's a shame to throw away a perfectly good shades due to one part being broken.

It might be a bit tricky to put the rolling part in the printed one, you have to start from the side and carefully slide it in. Can't make it any bigger cause it won't hold together well enough.