They are all clones of each other. All the hosts come form the same plant but they put their own internals in them. Right now you can get the Beamtech BT-950L version for $22 shipped from Tmart. It has the good driver in it, not the 2A driver Keygos has been using lately. All it is missing is the spring for the positive battery terminal (easily added).
See my review here and Tmart's special buy coupon here.
I can't see the driver from the ebay pics in the link Rick originally posted but in every other way it is the same as the Beamtech BT-950L.