Any one with a 1/8" connector will work. You can get them on eBay for a few dollars.
Premiere Elite (2TB) on MoCA
Premiere (2TB upgrade) w/ MoCA adapter
Premiere (320GB) on ethernet (was to be a Mini - too late)
Left DirecTV 4/15/07. Left TWC 8/8/11. Forced back to TWC 3/7/13.