Eagle Library Missing Micro b Connector?
I found this one online that seems to be very similar to the one you posted. I'm testing it against the ones I can source here locally too:

https://github.com/snakeye/eagle-lib/blob/master/connectors/microusb.lbr

If you need ones with surface mounted supports instead:

https://github.com/dvdnhm/Maker-Tools-Eagle-Libraries/blob/master/MicroUSB.lbr

I think these two should fit the common ones you find in the stores.