2002 Arctic Cat TBX 500 question on engine change?

I bought a 2002 Arctic Cat TBX 500 on eBay that has alot of engine parts missing. I believe it would be easier to just replace the engine. I pretty sure a Suzuki Vinson 500 will also fit, but not 100% positive. Does anybody know what would fit and can I use a Suzuki 500 Quadmaster manual shift engine? Please help!|||contact any person who is in automobile expert.