You could always go back through the older nominations that didn't get chosen for that particular week. It seems like crates tend to get nominated once, then never again.
Aside: come to think of it, the forum structure itself is a rather poor way of organising this. For example, there are several crates that don't have their own post, so you can't vote for them directly. You can't "reset" votes for each week, nor can you tell how long ago the last vote was made (maybe a crate almost qualified for CoTW status a while ago, but is no longer relevant?).
Anyway, going through the backlog and checking the TWiR posts, I'd say ... well actually, I'll put it in a separate post so it can be voted for independently of the above rambling.