Wow have I thought about this swap a lot, but where I balk at is getting everything to work properly like climate control. Sure you can get a mouse motor and transmission from 99-up Chevy to bolt in to a Frontier, its just sheet metal and frame rails which all weld very easily, but how do you make everything else work? The only way I see it is get a wrecked donor vehicle and take just about everything from it - instrument cluster - unless you can somehow repin the stock Fronty one, dash harness (because part of this plugs into the ECU as well and you will now be running a Chevy one), you'll need the OBD-2 port which plugs in to a separate part of the dash harness to be legal if you in an emissions inspectable state. I'm not saying it's impossible because there are finite amount of controls and sensors and you only have 12volts to deal with, but I know damn well that it's beyond the ability of 99% of the members on this board.
Turbo'ing the VG33 with a big single - cut primary kitties off of the stock manifolds, weld a new flange on and flip them upside down, put the turbo near the stock battery location or where the airbox used to be and then get a little creative with the exhaust is all doable. Trick comes to tuning. If you're handy enough to tackle this, you should also be handy enough to wire in a piggyback fuel controller (AEM F/IC or PCS-XFC will definitely work as they can handle both MAP and MAF vehicles), swap the injectors, get a couple wideband O2 sensors, some colder plugs and whip out your laptop to dial things in. Also doable, but still beyond the skills of 99% of the folks here. There is no kit and you'd have to creatively source parts that will work. You'd basically copy any vehicle that has an OEM recirculated style turbo system (because of the MAF), like the VWs, for your pressurized air routing.
If you were handy with a welder (and torch to preheat the manifolds) you could probably be in and out of that kind of build for less than $2500 if you cheaped out on the turbo. Which is cheaper than sourcing a KA24, everything to make it run, and then all of the boost goodies.