Ya i am a m226 six speed. It was off of 4x4 parts.com for 840$ and it came with the compressor free. the only other cost was some new bearings but they were about 20$ each. I'll get some pictures on my gallery.
I did the Install myself. It is not difficult if you have basic mechanical knowledge. there are some pics in my gallery of the compressor behind the seat if you cant view them let me know and ill repost some. i went with the small compressor it was free with the locker from 4x4parts.com probably upgrade though so i can use it for tires also.
Are you gonna put one in? if so and you need some more pics or have some questions just hit me up on here. sometimes i am gone for a while for work but ill eventually get on here and reply.
As far as I know the D40 Navaras built in Spain are 10 bolt and the D40 Navaras built in Thailand are 12 bolt .
Spanish built Navaras are very similar to the Frontier but the Thai built trucks are even a different length and some parts are not interchangeable