Trubendz for a cat back system.
Otherwise get yourself a bunch of mandrel bends and some straight piping and make a homemade True duals setup. Demonsvt has pics on his website for insperation

06 GMC Sierra 2500HD Dmax/ally 06 Pontiac G6 GT 05 CRF250R FOR SALE 06 KX65 with riding gear $2700 obo