Well the majority of the parts came from Groovy Game Gear.... electric ice 2 buttons, electric ice trackball, turbo twist high/low spinner with translucent white base plate for illumination. The joysticks I got from retroarcadeslive.com, though their RGB (multi) colour sticks have changed now, you can no longer control the colours as they have started using auto colour scrolling led's inside. A little mod work and I changed them to what I was after.
As for the prices, it depends on your actual setup. It definitely is not necessary at all to go the added cost of illuminating everything though I spent around $1000 AUD on the control panel parts. I have a total of 53 push buttons on my control panel and I want to light them all up

Hope this helps...
Jason