I agree - PC power supply unit.... thebasic ones are 300W , plenty enough

If you need a link , let me know , but google will help. Just remember
1) connect s many of the 12v and 0v together for best connections
2) i think its the orange wire which needs to be hooked up to black to power up

As a bonus you can have a 5V supply too if needed

Not best looking , but you can doll it up.