In general, the connectors of the micro:bit are a bit "hard"
The copper pattern, 4 holes and 1.25 stripes need to be a standard component to be cherry picked.
Connectors, 80 1.25 are quite often not available as standard components.
Some connectors I have found today: I will probably add to the list as time goes by
http://www.sullinscorp.com/catalogs/62_PAGE64-65_.125_HP_DS_WW_RA.pdf