Movement sensor cup type holder

[ShawnPreece]

Hi I need a holder for my driver side movement sensor, it is the round cup type so the sensor just pushes in and I have no idea where to start looking or where might sell these or even the correct wording of what it is im asking for so just wondering if anyone knows where I might be able to get one from? here are some pics or it:

 

here is the sensor:

 

and here is the cup type holder I mean from my passenger side one:

 

Thanks