American Underwater Products (AUP) discontinued the Aeris brand and folded it into the Oceanic brand in September 2014. Oceanic continued to support Aeris products.
Oceanic and Hollis were purchased from AUP by Huish in May 2017. Huish no longer supports the Aeris brand but fully supports Oceanic.
For sake of completeness, Pelagic Pressure Systems was purchased from AUP by Aqua Lung in May 2015. PPS is the OEM for current Aqua Lung, Oceanic, Sherwood, Genesis, and Tusa computers. PPS used to produce the Aeris computers. The PPS transmitter is used by Shearwater.
The Oceanic VTX, Aqua Lung i750TC, and Aeris A300 CS are essentially the same computer manufactured by PPS and they all use the PPS transmitter. Oceanic and Aeris are dual algorithm (DSAT and PZ+), Aqua Lung runs PZ+ only. All 3 are currently available from LeisurePro, complete with transmitter for, Oceanic $774, Aqua Lung $995, Aeris $945.
My OP is not an endorsement for the VTX, simply pointed out the lowest price I've seen for this computer, in case anyone is considering it. My primary computer is an Oceanic VT3, 8 years old, 1134 dives/1185 hours, I'm certainly getting my money's worth