85 GM C15 help

Hey, I was wondering if anyone could help me out. I have an 85 GM Pickup, that is now wrote off, you guys might laugh, but it was a boating accident. It was parked out on the front street and a passer byer was towing a boat. To make a long story short the boat came off the trailer, and smacked the truck. The truck has alot of sentimental value to my girlfriend, so I wanna get it fix up for her. I want to fix it up better than before so I am currently looking for a engine for it. Currently it is a 5.0L V8 4BBL/4BBL FI, it doesn't have to be this exact engine, I wouldn't mine bigger. I wouldn't mine a crate engine , anyone know where I could start to look? In Canada is where I would rather get it from but if I can't and there is somewhere in the states that has good prices that would be awesome. Thanks everybody for your help, ahead of time!!