Headphone Amp with Remote ? Antique Sound LH-01?

I'm looking for a decent, but inexpensive headphone amp to drive Sennheiser 650s, but here's the kicker - I would really like an amp with a wireless remote volume control. Looking to spend in the $400 to $800 range. All the dedicated headphone amps in that range (MF X-CAN, Channel Island, etc.) don't have a remote.

I came across the Antique Sound Labs LH-01, actually a pre-amp with a headphone jack, which comes with a remote (optional). My impression from websites is that the LH-01 is discontinued - can anyone confirm this? Anyone know where I could pick one up? Any and all other suggestions for something that would do the job are also welcome.

Headphone amp would go into the tape loop of a MF X-150; front end is currently MF X-RAY + X-DAC v3 + X-10 v3, and Magnum Dynalab MD-100.

Thanks,

K