Hello! Why not replace the whole A2000? They are cheap enough! Here is one for a current bid of $5.50.
HERE Hell the last bare bones A2000 I sold only got something like $30 on eBay. $120 for a power supply? That's nuts.
If you decide to convert a PC power supply let me know and I can help you as I am about to do the exact same thing with a A4000. The problem is making a PC power supply fit in a stock A2000 case.
