The original spacer between the two bars broke as I applied minor yet obviously excessive force. Here's the data for printing a replacement spacer.

Notes: Finding a good position for printing this part is a bit tricky as there is no flat surface. Work with minimal supports, this should suffice. Without support the nozzle is likely to losen the whole print right after the first layers, too.See the 3mf-file for my final orientation for print. This did work (surprisingly, I know).