Yep, it looks like they went out of business. It's a shame because I really liked their varifocal cameras and the night vision was excellent. I purchased 5 of them.
I had the same problem as you with the IR's quit working on one of them. The rest have been fine. It took a couple of months but they did honor the warranty and replaced my defective camera. I had ordered them directly from their website.
I don't know about their dome cameras. All of the cameras I ordered were varifocal bullets.
It seems Hikvision's and Dahua's are the way to go these days. I still prefer the ESC's when it comes to night IQ.
[i7-3770, 500GB SSD (RAID), 2TB HDD, 24GB DDR3 Ram, GTX 750 Ti video, Win7-64bit, BI-64bit] [1 BeSafe 2MP, 2 Huisun 10X PTZ v1 2MP, 1 Imporx 10X PTZ v2 2MP, 1 Dahua 12X PTZ 2MP, 1 Dahua 4MP Turret, 1 Poker 10X PTZ 2MP, 4 ESC IPC1-V 2MP, 2 Hik DS-2CD2432-I 3MP]