ihdillon: I assume you have it apart and can see the clip that sits under the boot, holding the knob in place? Note that there are four tabs which clip in place and secure the knob; using two small flathead screwdrivers (Read: model / R/C size), I worked them between the knob and two of the tabs, prying them open. A couple of good yanks and the knob popped out. The tabs are very stiff, so don't be surprised if you have to really work at them for a minute.
BetaDnB: A Blox knob is on my list now too. I'm waiting on a local shop to get the specific one I want in, so that I can go treat the Focus - I mean, myself - to a little gift.
2012 Yellow Blaze Focus SE Sedan (DD+Project)
1992 Bright White Grand Prix SE Sedan (Project)
SR #74/SMk3C #17/YBOC #03