If you don't want a the expense (or the fantastic heat/cold retention properties) of a Skunk, I can heartily recommend the Nissan 350Z knob (available from eBay for about £15ish) coupled with an Audi TT leather gaiter (£8.49 off of eBay).
If you're really handy (or know someone who is handy) with a sewing machine, I can also recommend unpicking all the stitching from the gear knob, ironing the leather flat, and using it as a template to create your own bespoke gaiter out of whatever material you have lying round.
Old black denim jeans work well.
Also, my mate is a Liverpool fan and he has recycled an old Liverpool FC football shirt this way in his Type R
