I've supplied some pictures of the screws and locations and a description of the screws. You might try HP PartSurfer to find the screws, or someplace else that sells the hardware.
two 7 mm P1 Phillips-head screws that secure the right hinge to the bottom of
the base enclosure.
Next, the two 4 mm P1 Phillips-head screws that secure the left and right hinge covers
While holding the display panel, remove the two (there might be four) 7 mm P1 Phillips-head screws
that secure the left hinge:
I hope these images and descriptions of the screws help. The images should be the right ones.
Thanks,