Hi Ritdav,
For my project, i have buy all on alliexpress, it's a very cheap and good quality, you must just wait 3 weeks delay shipping.The illuminated button are good on 5 volts or 12 volts with the same leds. the usb encoder is great with xpadder, you can buy a casino harness with all the wire for led and button you must just cut the near the jama connector and plug directly on your pacdrive .
Eric
https://www.aliexpre...f7b510959&tpp=1
https://www.aliexpre...2311.0.0.qDZvBE