Cross reference Nanda A7C to champion?

The closest plug that I have found is Z9Y champion.

--I went to NAPA and they could not cross reference this. They told me to buy direct from the manufacturer. Well the manufacturer is SUNL (chinese). So I bought direct from their website product page: http://www.motosportsparts.com/s.nl?sc=14&category=&search=spark%20plug