For the record a 99+ G20 takes the same charcoal canister and purge control valve as a 98 200sx 1.6L (probably 2.0L also). Dealer said nope - but when I dropped my '02s canister to replace it today with a 2000 G20 canister it was dead on to the spare one I have in my garage for the '98 200sx....

Anyways just FYI....

The bastards...
200sx canister - $70
Infiniti canister - $140
Junkyard canister - $50

:-P