I took my old Screaming Eagle off and threw on a "Trumpet" style one from e-bay.  J&P had the EXACT same thing for $115, e-bay....$14.99 gotta love it!  Put it on, a little skeptical, dut to my thinking it can't get any better than what was on there, but WOW!!  This trumpet is deeper toned and louder.  If you like the old school look, have no fear and get one of these! Welllll worth it!

I have a stainless "shorty megaphone" glasspack muffler that I think sounds pretty good but the Emgo version is relatively thin-walled.  I've seen it both at JCW and eBay.  They have a full-length megaphone muffler too.  Is it similar in appearance?  Below is an image from JCW.