A factory fit cat will cost about 6x more than a 2.5" universal cat. So I suggest you buy a universal cat and have it fitted to you old y-pipe, or better still buy a BAT y-pipe from www.BATINC.net and call it a day.
2000 SVT Turbo 295hp/269ftlb@12psi
#1 for Bendix Brakes Kits!
Knuckles rebuilt w/new bearings $55
AUSSIE ENDLINKS $70
Gutted pre-cats $80/set
A lack of planning on your part does not constitute an emergency on mine!