Ray035
Think what you need is this cable and the DB9 adapter
https://www.siderealtrading.com.au/product/eqdirect-usb-cable/?srsltid=AfmBOopPmXOiE4yoYZQEMHFZaoHj0zLvmI-HL-5DV1uPSskd8FhmujRL
Or something similar. Basically eqmod I think is the way to go.
That being said, I would check to make sure your mount(s) can be controlled by the ASIAIR.
No point going through this if your mount isn't compatible.
Also check any other equipment you intend on using is compatible.
Personally, I would wait for the ASIAIR Firmware to be updated through multiple iterations before buying it because there's always going to be the early adopter risk.