[herve_g]

Is it the plastic peg that's broken (where it clips) or is it that the headliner plastic piece where that rod goes that broke?

If it's the round peg, it might just be that it came loose because of vibrations.
When I was working on my new top, they kept coming off.

I hope for you it's not the long headliner plastic retainer that broke, these are a pain in the ass to change.