If anyone is interested, there are two Sound Valves VTA-70i amps and a kit (partial) up for auction on ebay. On some forums, they are considered very rare.
http://www.ebay.com/itm/190962129409
http://www.ebay.com/itm/Sound-Valves-VT ... 0962131492
http://www.ebay.com/itm/Sound-valves-vt ... 0962154249