Brake Problems...venting

[Ackattack]

Well nothing ever seems to go very easy for me. I was working on bleeding the brakes today. I get 3 of them done, and get to the front passenger side. The little bleeder valve (I think that is what you'd call it) was stuck shut. I had the right size wrench and everything, cranking on it and rounded it off (I think it's mad of aluminum). So I figure, well I'm going to replace it anyways, so I got out the vise grips and tried and tried to get it. It's stuck. So I'm like shoot. I get out the drill and drill a hole through it and use a bolt extractor...snap!!! break it off. Now the bolt extractor is stuck in the hole. So I take the old dremel tool, and just cut it off, and drill another hole. Put in a bigger bolt extractor....and snap!!! Break it off. So I take the hole caliper off of the truck and try to drill out the bolt extractor along with everything else....well the bolt extractor is made of hardened tool steel and I can't drill through it. So in conclusion, I have to get a new brake caliper. I figured I'd get one at the salvage yard, but I'm worried about it leaking. So should I get one at the salvage yard, or just go get a new one at the parts store. Oh, and if you didn't pick up on it, I have front disc brakes.