I cannot figure out how to enter a song efficiently with the following structure:

1) Introduction.
2) Verse.
3) Verse repeated, but with the last few measures different.
4) Bridge.
5) Verse, last few measures as in (3) above.
6) Bridge repeated, with the last few measures different.

I can get (2) and (3) by using a first and second ending. But now the bridge is part of the second ending. I can put a backward repeat at the end of the bridge, but now I don't see how to vary the last part of the bridge.

Can anyone help? Obviously I could cut and paste the whole bridge, but I'd rather not.

For good measure, I wouldn't mind being able to put a coda after the second bridge.