Shifter knob/gauge cluster color

[DevilGirl]

I'm looking to replace the stock shifter knob on my MT LB. Not sure exactly what I want to get. I've been trying to do some searching for some cool looking ones that arn't overly priced (I know there are a lot out there that look awesome! but I can't afford them, I do have to be mindful of finances for awhile). Any thoughts as to where I can find an affordable shift knob? Also, do I need to be mindful of any sizing issues?

My favorite color is purple, and with the interior being primarily black, I'm thinking something with a purple tint to it, just to give it a lil nice color touch.

Also, my gauge cluster (as well as the other central controls one the car) are this hideous orangey-yellow color. I've seen some other users pics that show a nice blue cluster. How, if possible, do you change the color? Is it just the bulbs? I'm fine with the radio and climate controls being the orangey color, but the gauge cluster is just wrong, at least IMO!