Alternates are, IIRC, allowed in up to the end of the first 2 levels.
TBH, you don"t see a lot of bustouts in that time-frame. This is deepstack poker and barring two big hands getting overly frisky you just don"t see it.
It happens, but being number 5 probably isn"t going to get you in. No"s 1 and 2 stand the best chance but even those are long shots.