I needed to design up a bracket to mount a Continental FlexFuel sensor to my car because reasons. It's pretty straight forward design. Designed for 10-15mm long M6 screws, separation between centers is 2.25". Sensor is held into the bracket with a standard width zip-tie.
M6 Screws - https://www.mcmaster.com/92125a234
Fits the following Flex Fuel sensors:
GM - 13577429
AEM - 30-2200 / 30-2201
LINK - 101-0034
NOTE: Print in the photo is slightly different than the uploaded .stl.