I think these guys are heading you in the right direction. You will need something larger than a weeder for the Eagle. Lawnstation.com is a good place to buy Poulan saws at a good price, but do not forget to check the local small engine shops. That is where I buy most of my engines for converting. You would be surprised how many saws get hit with a splitting mall or run over by a truck/tractor. It doesn't take much damage to total a saw, usually a broken gas tank or handle will be to expensive to fix, so they end up in the junk pile. These are the ones I look for, usually $20.00 buys them.
Tim