I've had my HDSP 9652 card for a few years now. I previously had this card in a Gigastudio slave machine and its worked great.

I've recently overhauled my home studio and moved from Gigastudio to a Kontakt/VST environment. As such, I now have my HDSP in my main audio machine. However, this has proved tricky. Before, I was routing the ADAT and SPDIF outputs from the Gigastudio slave to my audio master PC's inputs. Initially when I installed the HDSP into this machine I had it running alongside another audio interface to route the SPDIF out to its SPDIF in, to my monitors/headphones/etc. However, obviously the two cards are conflicting slightly and causing stability issues and so I am wanting to exclusively use the HDSP.

I figured that I would buy the AEB4/8 in and out, plug it in and the problem would be sorted. However, I'm obviously having extreme difficulty picking up an AEB interface anywhere - they're all out of stock and discontinued. What would be the best alternative to getting my audio out of the HDSP and to my analog speakers/headphones (and getting my analog inputs into the digital HDSP). I have roughly 2 inputs and 2 outputs I need to route and I have a budget of ~€250-500.

Any advice would be appreciated