well the stocks are easy. 1919s should have the straight style stock with grasping groove cuttouts, easily found on ebay, though matching handguards might be a little harder but still doable. they do not have dates stamped on them. barrels are a little harder but many pre WWII barrels were shot out during the war so it's next to impossible to find one. it's nearly as hard to find a rifle with matching barrel and receiver dates. if you can't find a 1919 barrel don't sweat it. as long as it's a springfield barrel to match to a springfield receiver(or rock island to rock island ETC) then nobody is going to bat an eye at it.
ignore my complete lack of capitalization. I still have no problem correcting your grammar.
I never said half the stuff people said I did-Albert Einstein
You can't believe everything you read on the internet-Benjamin Franklin