I won a free engraving on a shift knob from http://www.americanshifter.com/. If anybody is interested, I will send the link to the first person who pm's me.
Edit: This is just an engraving. You have to buy a shift knob and the engraving is free.
The thread size on these knobs are 16mm x 1.5. Not sure if they will fit our trucks.