Help, need help locating a correct ABS sensor for a 08 Subaru tribecca

I have a 08 Subaru tribecca with a bad drivers side front ABS sensor, code 55 on the dash, I purchased what I believed to be the correct part, and after my mechanic went to install it did not match what was currently in it and would not fit, I have been on numerous auto part sites and everything shows the same abs sensor I purchased but its not the right one, has anyone come across this issue? Or have any suggestions? I have already reached out to my local Subaru dealer and still waiting but my car is due for inspection and I have another appointment soon for the abs repair but I need the correct sensor and I am trying to avoid buying a whole hub when all I need is the sensor, please look at the photo to see what I have vs. the new one that was not a correct fit