need to know where to find a new engine?

hey guyz whats up my g/f has a 98 z24 great car me myself i love my hatchback si anywayz it has 130k on it it runs strong but i want a back up motor any sugestions on where to get a rubuilt or new one?

pick n pull, junkyard, someone who has a totaled car with a good engine, contact an insurance company and see if they had any customers that have totaled them, and buy one back from them... that should give you a few places to start looking.