In the US there are only a few options: the four volume, in 2 different bindings, the single volume Christian Prayer (I believe this is available in two or three editions, but all with the same art style) in at least two bindings, shorter Christian prayer (psalms for Morning and Evening IIRC, but very stripped down otherwise), and a couple other similarly incomplete editions.
ICEL (again, IIRC) holds the exclusive copyright and they have not been easy to work with in the past. The good folks at NLM have been trying to convince them to use Creative Commons (which would make it much easier to produce a new edition of the books) for the Missal, but have had no luck. Worse yet, any new edition will almost certainly use the Grail Psalter, which is property of one of the Monasteries, which is also not very cooperative with regards to copyright.