Replacement Exhaust for '91 Cabby

My 1991 Sportline has a gas flowed head, Kent cam and TSR exhaust manifold with the rest of the exhaust system being standard…although I think that the backbox is a standard replacement Bosal.  Anyhoo…I want to remove the centre section silencer so in effect want a downpipe back performance system.  Any recommendations?  I have seen that Ashley Competition Exhausts do one…any good?  Also, I read somewhere that the S2 cabby was based on a 'Rocco floorpan…does that mean an exhaust of the same year would fit my cabby?  cheers.