Don't know about the first one but the ywrobot one is available here:
http://omnigatherum.ca/wp/?tag=fritzing6
In general google is your friend. I usually use the search term
"fritzing part ywrobot" (in this case) as there are lots of Fritzing parts available that aren't in the distributed parts bin (yet). As well a search in this forum would have found this one (as someone else asked earlier). The projects area on the main site is another good source of parts as well.
Peter