There is an SVG file here:
https://www.dropbox.com/s/pb256r5w3e10hh8/YACoin.svg
A PNG file with the name is here:
https://www.dropbox.com/s/18lbvjz10y2z9cu/PNG_LOGO%2BTEXT.png

I guess it'd be better if the official website can host a copy.