Since the SVT parts are a direct bolt on to a regular 00-05 focus, shouldn't be an issue to go back an bolt the regular focus parts on an SVT. Though you may be disappointed w/ the handling.
Though bottom line the SVT kit from ford racing is a good kit. Maybe compare an itemized part list of everything the dealer is recommending vs. what comes in the FR kit??
Parking Lot Hero
2008 WRX daily driver
2003 ZX3 23D Autox Car 42 FSP
"Hella Functional - Raced, Not Hard Parked"