The Fan slider knob in my brumby has almost cracked in half and I decided to make a replacement for it before it breaks completely. I then modified the fan slider for the vent slider further up on the dash ( I never had the vent knob to begin with so that's why I used a mini fan knob).

EDIT: The V2 fan has the slot moved down a bit further so it doesn't hit the top. And the V2 of the vent knob is more like the actual one as I actually saw one and realised I was way off.