Trace is now owned by Gibson, so you could try their site for a list of dealers. What makes you think you want a Trace? (I'm just curious)
I've owned an AH350SMX head and was impressed by the build quality and tone. I consider them to be a sort of one-trick-pony when it comes to their sound, but it's a good trick. If you like the Tony Levin, Mark Harmon, Patrick Dahlheimer and Brian Ritchie sound you will enjoy the SMX-series. And who can resist that green glow? Good amp, just don't expect it to be a chameleon.