[s-cars] Exhaust Manifold Cracked: Where do I find a cheep replacement?

[Edward]

Hello all,
Whacked my exhaust on a rock *hard* a few weeks ago causing an exhaust leak
under the hood.  Turns out the manifold cracked near the 4th and 5th
cylinders!!  Grr!

What's the cheapest recommended option?  Can you weld 12-year-old rusty cast
iron?  Somehow I doubt it...

Is there a recommended source for them used?  Anyone have one they swapped
out during an upgrade they wanna part with??

I did a quick search of e-bay and came up with:
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=190085620661&fromMakeTrack=true

Anyone know who EDT is?  Is this a worthy option?  Certainly doesn't look
stock...

Thanks for all suggestions.

Cheers,
Ed