Hi, I have some experience with building data terminal for transmitting & receiving programs to / from CNC punching press through RS232 port. So if you provide commands and more information about your device, I can try to build experimental program to test communication between your device & computer for small fee. If tests will be successful, then I can do the rest job. Just need to know what you need. It depend what final price will be. If it is not big project, then 50 GBP can be enough.
Best regards,
Remis