Not currently available in the US. I've communicated with HK Audio and this is what they emailed me:

Thank you very much for your e-mail and your interest in the LUCAS XT system. Unfortunately, we are currently not represented by any dealer on the US market. Therefore, we are unable to quote prices.

However, we are negotiating with some companies, so we assume that HK AUDIO products will soon be available again on the US market.