Help finding source for this "proximity sensor"?

[Dave Thacker]

I found a little arduino project(1) that makes a  jack 'o lantern trigger some lights and noises when someone gets close to it  The author of the video uses a part he calls a"proximity sensor." (picture below)

My searches in Mouser, DigiKey or Ebay are finding a lot of proximity sensors but nothing like this part.   I'm finding part thats are $20 or more and I think this would probably be less than $10. 

Could someone point me to a the place to find the part? Thanks in advance!

DT

(1) https://goo.gl/2xAmdE

Attachment: mystery_part

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Dave Thacker 

Omaha Mini Maker Faire Production Team 

SysAdmin, DBA, Postmaster, Maker, Odd Jobs

[David Knaack]

This? https://www.sparkfun.com/products/242

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[brax]

https://www.sparkfun.com/products/8958

looks like the long range up to 5 ft. version in the pic...

scott