Fill Command for Levers

When I use the /fill command to reset levers for my maps, it places them upside down, if some how you can make a separate command to reset levers or add on to the existing command a rotate part. For example /fill ~ ~ ~ ~ ~ ~ levers 0 replace levers 0 180
The 180 rotates the block 180 degrees.
And maybe this can be used for half slabs... rotate them on to there sides!