There was just a post yesterday or the day before on a deal on bags. Do a search for it, if I come across it, I will post it here for you.
A tip that works rather well, at least I think it does
Get your sausages frozen first, by setting them on a cookie sheet then once they are nice and hard, put them in the bags. You can put them in there unfrozen, but I find when I use my foodsaver and they are soft, they "squish" on me, sometimes squirting the meat out the ends a bit. Just a thought.
Update, try these http://vacnsac.com/http://www.kmart.com/shc/s/p_10151_1...0070926x00003a