Hi Jimmy, Tim is absolutely right. Some of the aftermarket glass is a very poor fit,especially at the bottom corners.
There has been a few discussions about this already.
As Tim said,if you think the glass you took out was a good fit,have your local glass shop cut the new ones to match.
Even if the new ones did fit,chances are they will leak on account of the gasket not making proper contact with the body surfaces,and worse case scenario is you'll break them trying to fit them!
Good Luck
Jock.