I'm thinking, theoretically you could get a generic T25 turbine housing and mate it to the Fiesta T2 cool side and center. Using an ERST header with a T2 adapter and then routing the exit again to the standard Fiesta exhaust with another adapter. The only thing to take care of would be that the turbine wheel in the Fiesta matches well the T25 housing width. Or, maybe replace the turbine wheel if needed with the correct sized one.