Topic: Where to get zx128rom-for-divide

I recently got myself a Spectrum 128 +2 (the gray model with a casssette recorder onboard), and I was hoping to use it with a DIVMMC for 128K BASIC programming.

However, when testing ESXDOS and the DivMMC in FUSE, BASIC simply crashes whenever I run a command. Then I came across this line in the release notes:

[17/02/2018] Commands: Added .128 command to test 128K mode using Velesoft's "zx128rom-for-divide" ROM (lordcoxis)

Where I can I get this ROM? Is there discussion about it somewhere, so I can understand what this does that the factory ROM doesn't?