anyone have a junkyard bucket swap recipe?

anyone know of any seats that will go right into a '72 Dart and replace my extremely worn out bench? I know I will have to drill some holes but if anyone can tell me where i can get the buckle or a seat belt to do it, let me know. I really wanna do this as cheap as possible. I think some seats out of a Stratus or other cloud car would work, just unsure on how to rig the seatbelts