It's a simple part and I'm not sure, if it's worth to publish ...
As it helps me to avoid throwing away the scissors, it might help others, too or give some motivation to fix broken things.
The scissors uses a simple (cheap) plastic insert as a counter part for the bold of the joint. It was predictable that this construction wasn't as stable as the good old tapped holes :-(

A OpenScad 6liner reanimated the scissors. After printing, use a M3 screw tap to prepare the hole for the bolt.

Ultimaker

Ultimaker 2

No

No

0.1 mm

50 %