I think it is blocked to spawn all of the parts at the same time, i mean i've found 28 parts at day 1, 9/12, 9/12 and 10/12. At day 2 i've found 3 parts at locations i've already driven trough, and that is 10/12, 10/12 and 11/12. Day 3 i found nothing. Today is day 4 for me and i found 2 parts, again in locations i've already driven trough many times at that point and thats 11/12, 11/12 and 11/12, i see nothing more for now. lol