If you want to see WW2 warbirds in person (almost always the best source) look up EAA.org or airventure.org for info on experimental aviation asociation fly-in in Oshkosh, WI. It's a long, but doable drive from Toronto. Just about every warbird out there, or close. Museums are great, too. If you want USA warbirds, Wright-Patterson in Dayton OH has a copy of everything the USAAC or USAF has flown, plus a few more.