Dear Kanishk, The entire Namakam and Chamakam are available in Sanskrit (along with English transliteration) at the following website. The files are very nicely done.

http://www.sai83atirudram.org/veda_study.html

The specific links are

http://www.sai83ati rudram.org/ hymns/Rudram_ combined_ v1.pdf
http://www.sai83ati rudram.org/ hymns/Chamakam_ final.pdf

Om Namah Shivaya