You can often find them at cubeowners.com, eBay, and from craigslist.org and lowendmac list: http://www.lowendmac.com/lists/ swap.html Do not get the new ones from China, be careful. Run from $50-$100. See, too: welovemacs.com, smalldog.com, powermax.com and do a search on dealmac.com Cali