There are lots of parts for the 2.0l, being manual doesn't change anything, except for the transmission parts, all other parts are for the engine
http://www.kdmstuff.com/index.php
http://www.kspec.com/
http://www.sharkracing.com/acecart/bin/shop.cgi
http://www.ebay.com/
You can also look at parts for the 2003-2006 Tiburon and 2001-2006 Elantra, the 4cyl is exactly the same.