You will need the following -
Bose loom with steering control - 29-674
Patch lead - 29-020 (Pioneer specific)
Fascia
Possibly some line boosters, I did with my Pioneer AVIC f900bt as the Bose amp runs on a high frequency.
All available from incartec here - http://incartec.co.uk/nissan/1929/1036/2072/78/Browser.aspx
I have done the shopping list for you ignore the 29-007 patch lead, that is an older model that does not work so well...
There are lots of good threads in the I.C.E. section, to be honest any half decent place should be able to swap out you Bose