OK, so perhaps Trump won't win in November. Hillary has $1billion in bribes sitting in her bank account, so perhaps no Republican will win. But the solution isn't to undo the results of months of primaries.
The GOP electorate has spoken. They don't want another Bush. They don't want Mittens. They don't want any other member of the GOP Elite. The vast majority of the votes cast in the primaries went to the candidates that the elites didn't want: Trump, Cruz, Paul, and Carson. Slipping in at the last minute with a smoky backroom candidate will destroy the Party. And it should. If the Republican Party cannot abide by the results of elections, then it deserves its place on the ash heap of history.