Per a message on Facebook:
TheMonkees All tour merch will be available on Monkees.com after the end of the tour!
For pricing and pictures of tour merchandise, click here.
UPDATE 3/21/13: Rhino, via the Monkees Facebook page, reports that 2012 merchandise will be available on Monkees.com soon.
UPDATE 7/19/13: 2012 merchandise is still not available online, but some items from the 2011 tour are for sale on Monkees.com.
To see merchandise being sold on the 2013 tour, click here.