Thank you sir!Here is the actual website for Kanger in the US. The parts store that is.
http://www.mcssl.com/store/kangertechusllc but there are also other places to get those o-rings like
http://sweet-vapes.com/accessories/airflow-controllers/protank-mini-protank-o-rings.html
http://www.vapesupersaver.com/seal-rings-for-protank-aerotank-and-genitank/