I have a freind that have actually try to import his own metla body and it got sized by customs. And he order somes other parts from UNc and From the States and the shipping process never took more than the normal delay.
He paied for 3 days shipping and got it in time and the tracking number never show that the pakage was on hold.
I think that there's is a list some were but not for the you and me trying to import 1 or 2 items. Just immagine howmany people woud be on that list !
CBSA cant afford to pay all the personnel required to check on regular mail and not delay the process at all.