a new engine

whats up people, im thinking about purchasing a new engine for my truck, but i have no idea where to look for them, besides like salvage yards, im probably gonna get a rebuilt one if anything. i wanna get a 4.3 for my 94 s10. does anyone know a site online where i could go and get prices or anything like that? thanks alot, or if anyone has any better idea's, let me know, im open for suggestions. thanks

some of the auto parts store can get crate engines and can give a price over the phone