Sorry to see this breakage Clemens, I guess you are well within the warranty period.
This
company are very good to deal with and have a variety of fittings. I know nothing of the CX chassis fittings but Woolies will have one to suit if you search around a little. If export is an issue let me know the part number and I'll order it and pop it in the post to you.
Good luck with the fix, I know this has happened in the past to the Classic bodied cars and it was a very gentle drilling out of the remains of the screw with a pin chuck if I recall correctly.
This ^^^. The fitting is a wood screw, well it is on Trads. Mine snapped off flush, and a pin chuck, after first attaching a suitable washer to protect the paint, (double sided tape) and a couple of nights manually working the pin chuck until I got sawdust......I tapped in a triangular mini diamond file and the remains just unscrewed out. There are a couple of options on length on the threads.
For a short time, MMC used a Dura-dot fastener there, but it needs something with tenacity, so the Tenax works best.
