Here is the list of Stock KDZ firmware for LG G Stylo (aka LG G4 Stylus).
The LG H630 is an LG G Stylo variant which was released as LG G4 Stylus in Global market.
T-Mobile G Stylo H631 KDZ Firmware:
MetroPCS G Stylo MS631 KDZ Firmware:
LG G4 Stylus H630
Note: PLease USE XDM download manager to download the kdz firmware from above links. Learn how to use XDM to download LG firmware, check this guide.
So far, we can not find the KDZ firmware for Cricket G Stylo H634 and Sprint G Stylo LS770.