Send RDI your factory shift knob and we can refurbish it for you!   Comes out looking absolutely brand new.   See pics.  Note this is for us to refurbish YOUR knob. You send it to us, we make it look new again, and send it back to you. 
 
If your knob is severely cracked, you will need to purchase a new knob from us (or find one elsewhere).  Email us for more details as we only keep a limited supply of these on-hand at all times.