Definitely going to be custom - no 2nd generation FX turbo "kits" exist at all.
HKS makes a kit for the motor inside the FX50, but things like the exhaust manifold, turbo manifold, intercooler piping, mounting... all will need to be fitted and customized for the FX50.
You could start with a Jim Wolf Technologies TT kit for the first gen and then have piping fabricated to fit the second gen?
What Logan said stands - find a speed shop with a good reputation and talk to them about what you want. They can give you a ballpark estimate and I'm guessing it will be somewhere between $12K and $18K. You can always spend more.