Most of these auto/light-aircraft compressors are the same, its just the brackets that are different.
Expect to pay over $1000. You may be able to get a good workshop to order one in and swap the brackets over. (ask them to look for the compressor model on the compressor itsself and then ring Bosh or whoever to order a replacement - Nissan didnt make their own compressors, they outsource them and add a bracket)
I would avoide second hand as they tend to be less reliable once they have dried out and been without pressure for a length of time.
Hope this helps.