Usher Audio Dealers in the US?

Where can I buy a pair of DMD tweeters for my Dancer Mini One?
danoroo - Katli Audio -
Thank you Bill K. Not that I'm averse to Katli Audio, but are they the ONLY Usher dealer in the US? What if someone in Boston wanted to audition Usher speakers? Would they have to go to California to do so? That being said, I'm sure Katli Audio will be more than happy to sell me some new tweeters. Thanks again for your reply.
They are the US distributor for Usher, so they should be able to provide information about any other US dealers.