I never heard of them before, but there is a guy from Dearborn Heights, MI who is trying to sell this exact setup on US Audiomart for $600!!! ;^)
I emailed Jim at Purist Audio Design and he said he made this system back in the Mid 90's and it was called the Quartesense System and was nice enough to email me the original spec sheet on the system. I updated the US Audiomart listing along with the price.
I have taken very good care of these and they still sound wonderful when driven properly and I am asking $1,000 for the system or best. It would be hard pressed to find a system like this for that kind of money.
Only downside is they weight a ton, each satellite with the steel stand weights around 90 lb's and the subs are around 60 lb's each.