I end up using images.google.com with the query: <keyword> ext:svg This usually finds me good options, many from wikimedia etc, which are under a open license

I end up using images.google.com with the query: <keyword> ext:svg This usually finds me good options, many from wikimedia etc, which are under a open license. Many times, if you only can find free and open images, but in raster format, use something like vector magic to convert them to SVG.. VM usually does an excellent job with basic handholding.