Where can i buy cheep parts for Acura rl 3.5 1998 easy 10 point ?

my ACCURA rl 3.5 1998 Passenger side window doesn't go up. i tried pulling it up but it keep falling down . i think its window regulator . i have no $400 to pay too dealer , by the way i have 3 out 4 windows doing same thing and my car by kbb isn't worth fixing. so i need web site addres of the place where can i order it. lol any how i need to fix this problem before someone steals my car or stereo . i will give 10 points to ya all. I need help asap thank .