Is it still possible to find new printings of the Adler machzorim, in particular those for the three festivals (Chag hamatzot, chag hashavuot, v'chag hasukkot [Re'eh maftir, forget actual citation])?
This isn't quite in print, but you can see the Rosh Hashanah one in full here: http://hebrewbooks.org/42793
The others may be online, too.
It does not seem to be in print. But I did find this:
Service of the Synagogue
George Routledge (Author)
3 volumes, New Year (1) / Day of Atonement (2)
For a picture see: http://www.manorhousebooks.co.uk/PICS/IMG_0764.JPG