IDIoit
MachinistFabricator
I ordered this cheap seat before I removed anything because I thought I was going to have to drill it, it's pretty neat though, it has a bunch of different sized "guides" to center the drill bit, provided it's broken off below the surface and somewhat flat. Definitely worth $19, it also has some hammer in extractors but I wouldn't really trust them. I had planned on using them with left hand drill bits
http://www.ebay.com/itm/261659054019
when I break exhaust bolts, that's when I know its time for a valve job

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