Need info

hey all
i just bought two trail bosses that kinda run and 2 for parts for super cheap and i was looking for info on what year they were i know where the 7 digit vin numbers are but on all my other quads theres a mfg date sticker is this not the case with these?? i need the carb to jug boots and a headgasket/piston ring set to get mine going and im also not familiar on where to get these parts the cheapest since im in canada and most parts are obviously in the us im ive had lots of polaris snow mobiles but no atvs any info would be great
thanks in advance!!!!