It’s taken a little longer that I wanted, but finally ‘Honeymoon Blues’ is available on other platforms too:

Nook:
http://bit.ly/1nBFkrr

iBooks US:
http://bit.ly/1vPOu97

iBooks UK:
http://bit.ly/1vPOrtP

Kobo:
http://bit.ly/1le70H9

Smashwords:
http://bit.ly/1rzmfNZ