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This was the only one I found, however, I have no idea about this company so I can't comment on the quality.
https://jcpal.ca/products/easyon-privacy-protector-for-2016-macbook-pro?
3M does privacy filters, but they are designed for the previous generation rMBP and I am not aware of a new one released for the 2016 TB MBP.

A quick note on privacy filters, they are not perfect. They are great when you are just sitting beside someone, however I have found they are not very effective for people behind you or not completely beside you. The ones I have tried on rMBP offer LIMITED privacy protection, of course a little bit is better than nothing at all in certain scenarios.
 
Of course they are sold out!!! Even though it doesn't look perfect its better than nothing and I love that it's easy on and off. I didn't see any reviews anywhere though, so that doesn't help my decision hmm.

This was the only one I found, however, I have no idea about this company so I can't comment on the quality.
https://jcpal.ca/products/easyon-privacy-protector-for-2016-macbook-pro?
3M does privacy filters, but they are designed for the previous generation rMBP and I am not aware of a new one released for the 2016 TB MBP.

A quick note on privacy filters, they are not perfect. They are great when you are just sitting beside someone, however I have found they are not very effective for people behind you or not completely beside you. The ones I have tried on rMBP offer LIMITED privacy protection, of course a little bit is better than nothing at all in certain scenarios.
 
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