Just decided to try another fingerprint reader.
The smallest I found - HP NX6325.
After adding connector and wrapping with tape:
Became very practical:
But I found this fingerprint reader to have really bad performance. You need to swipe finger really the same way as first time to make it recognise. This makes this scanner absolutely useless because no chance to succeed in first three times. The previous reader from Lenovo laptop works 10 times from 10 tries and accept variations how the finger actually swipes.