If you have any trouble located those you can try NGK TR6 stock no. 4177
the 4177 part got me for awhile every one always said get the TR6's but never said the stock number. After about 4 more parts stores (local national chains) and another hour sifting thru old threads some i found the stock no.
FWIW, Dont forget youll have to replace copper plugs often. Mine are officially shot as of yesterday- car is sputtering and missing like nuts. (At least I'm hoping its just the plugs :o )
I got about 15k out of 103's, did not spray on them.