Your best bet is a google search for "fritzing part 74ls00 (you may want to use varients like 7400 74hc00 etc because someone may have made different series but same format part). It also depends on how fancy you want the parts to be the first example below is fairly hard (it is the 4001 in core parts and a subpart implementation at that, which means the individual gates can be moved around in schematic, the second example (a 74ls32 from core parts) is relatively easy as it is a generic ic with the labels changed.
there is a description here how to do parts:
There are tutorials on parts making (that apply to 0.9.3b which many of the others do not) here:
as well a number of us are willing to help you learn to make parts if you post questions here.
