An FTA receiver will NOT get you Sky Angel or DISH Network channels. Those are encrypted and require subscription. So you will need to replace your damaged receiver with a new Dish Network receiver, then call them to activate new receiver.
I recommend you read the FAQ section:
http://sadoun.com/Sat/FAQ.htm
As far as FTA, you can check
http://lyngsat.com/america.html for available FTA channles.