A web font for Sundanese is needed.
Sundanese Unicode font is a common Free (GPL) font, which is available in attachment.
For references, here:
http://www.unicode.org/versions/latest/ch17.pdf
http://std.dkuug.dk/jtc1/sc2/wg2/docs/n3022.pdf
http://www.unicode.org/cgi-bin/GetMatchingDocs.pl?L2/06-002
http://std.dkuug.dk/jtc1/sc2/wg2/docs/n3648.pdf
http://www.unicode.org/cgi-bin/GetMatchingDocs.pl?L2/09-190
http://std.dkuug.dk/jtc1/sc2/wg2/docs/n3666.pdf
http://www.unicode.org/cgi-bin/GetMatchingDocs.pl?L2/09-251
http://std.dkuug.dk/jtc1/sc2/wg2/docs/n3836.pdf
http://www.unicode.org/cgi-bin/GetMatchingDocs.pl?L2/10-143
http://www.unicode.org/cgi-bin/GetMatchingDocs.pl?L2/14-034