I have an aerocharger 53 series turbo with pure logic fuel controller and an airbox for sale. It came off my 08 m8. The turbo is in great shape and has aprox 800miles on it. Very clean install. no need to pipe coolant or oil thru this turbo. This is not a complete kit. you would need a fuel pressure regulator and a fuel pump + gauges. I'm asking $1600 for everything. If you have the know how to build a simple bracket to hang the turbo and build a charge tube you could be all set up for around $2000. I'm not sure if the airbox will fit the m7 but if your interested I can make a couple of phone calls and find out.
Got a areo 53 charger with complete install for the M7, was running it on my 09 M8, but want to upgrade to the 2012, and the turbo is to small. $2200.00 boost werx controller, ovs clutching