You're going to be hard pressed to find a single power supply with all of those values, especially at the current you want, the supply would cost hundreds of dollars. I'd try a website like mpja.com and look through some of their supplies. You're going to need more that one. You can find +12 +5 -5 and -12 as well as 3.3 on a PC supply, though the negative rails don't supply much current the + rails supply well more than what you need, then just buy an inexpensive variable supply.