Hej Liam,
just wanted to confirm your mod is working.
Although the original resistor now rests in peace somewhere in my carpet, I was able to replace it with with some good old resistors 
I combined a 1 kΩ and a 500 Ω resistor to replace the original resistor.
root@raspberrypi:~# lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 003: ID 0658:0200 Sigma Designs, Inc. Aeotec Z-Stick Gen5 (ZW090) - UZB
Bus 001 Device 002: ID 2109:3431 VIA Labs, Inc. Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Cheers,
Bjoern