Any good auto parts store can order them. I like NAPA, they pay their workers more than $3.00 an hour....they know what they are talking about and can order anything.
It is confusing when trying to figure out the hot plug numbers. Each make of plug uses different numbering systems....it'll make you go insane if you put any order to it. On champion plugs, if you ask for a truck plug, it is usually hotter than stock. There was a type I used that were black in color...i just dont remember the number.
SgtDel