Quite recently, maybe a month ago. This is where I bought it from:
I believe it is this product:
https://webstore.hauppauge.de/WinTV-dualHD
Anyway, I am sure it is supported on at least some Linux versions, it was running fine on RPi3B+ (just too jerky to be usable, but both tuners were found and working). I can post logs from RPi, if it helps.
Looking for the IDs on the net, I found this:
Hauppauge is mentioned there with both IDs, and from quick look, it does not look they would be handled separately.
- 2040:0265 Hauppauge WinTV-dualHD DVB Isoc
- 2040:8265 Hauppauge WinTV-dualHD DVB Bulk
Edit: there are differences in the code to handle bulk transfer, supported by the newer cards, I was wrong, sorry. So probably driver update is needed?