Hanging bellflower tips

What's the typical method for hanging bellflower tips? I'm preparing to install a set in a week or two. They're 30" long, so they'll need some support. The problem is, they come already chromed, and there are no tabs for hangers, etc. I don't want to use any type of wrap around strap that would be visible. My initial though is to drill and install some rivnuts on the hidden side of each one and make some bolt on hangers. If there are others out there who are running bellflower tips, how are yours mounted? I'm open for suggestions. Thanks very much.

Ric
Austin, TX