I'm a little late to this but I had one of my Scan125 users trying to get RRUK Scanner Linker and Scan125 working together.
I can now say that the next release of Scan125 (at a later date Scan75) will create the necessary file for Scanner Linker to work with Scan125.
The code changes are currently being user tested and I'm waiting for good and bug free feedback.
I've no idea how many ScaN125/Scan75 users also use RRUK subscription and their programs but hopefully the forthcoming changes to my programs will make some people happy?