repairing the front end of a 2007 yaris

[cesturdy]

i was watching a diy video on repairing the front end of a car. mention was made of placing the headlight header panel on the car before placing on the bumper cover in order to determine proper alignment. my car was in collision and i tried recovering all the parts i could. but i could not find a header panel. would i be right in saying that smaller cars such as a yaris do not have a header panel, and that the bumper cover itself just attaches to the core radiator support and side support on the fenders. but than i also found that i have a ripped absorber which apparently goes above and under the bumper cover. any suggestions for properly measuring the core support and using a hammer and dolly to place it back in measurement? i have a haynes manual for my car and am planning on buying also proper tools/parts. where is the best online locations? anyone have experience with harbor freight or 1A auto? any further suggestions about repairing the front end?