Anyone know if a recording of those few performances exists?

If so, where could it be obtained/downloaded/purchased?

I know there's a (very strange) bootleg dvd of Rob Halford singing for Black Sabbath on the pirate bay, or at least that's where I downloaded my copy forever ago. It's from some Ozzfest show. They sounded great but the crowd was all bitchy and the video would stop for awhile to show some weird psychedelic shit then back to the video which somehow cut out all the crowd noise, it was really strange.

You don't mean this? Do you?

There are two sets of performances. The main one being from 1992, and another gig in 2004. Plenty of videos exist from both, for example:

http://www.youtube.com/watch?v=z1TK3Ws-TRQ
http://www.youtube.com/watch?v=R-4BthN-TjA

Plenty of other information is available, such as here:

http://www.black-sabbath.com/personnel/costamesa.html

I know of at least one bootleg CD, featuring Ozzy on the cover and titled something to the effect of "Ozzy's Farewell Gig", for reasons explained by the above link.

There were talks about Halford joining Sabbath officially. I like to think there's an alternate universe somewhere that it really happened, and another version of me is enjoying the arse kicking result.

Though the Metal God is obviously a brilliant vocalist, Ozzy's video as well as the related ones I went through seem to show that he doesn't exactly merge with Sabbath. The bands are completely different (despite both being early contenders) and Halford doesn't seem to do as well with doom. The 1992 "Heaven and Hell" performance was probably the worst offender.

While it's interesting as regards the historical aspect (I don't believe any of Sabbath's vocalists collaborated on a Halford song the way Dickinson did), I'd rather just listen to Judas Priest and Black Sabbath with their proper vocalists.

Now Dio or Martin on a Priest song (not one of Halford's insane falsetto performances, of course) could be intriguing. Anyone know if those guys covered anything like that?

Now that could be amazing to hear.

The version I have (downloaded) is called "Ozzy Meets The Priest". Info here:
http://www.black-sabbath.de/bootlegs/priest.html

Although I have a two CD version (both nights) with different artwork I believe... I want to say I got it from Ultra Boris' site but it was a long time ago, not really sure.

I have a double cd bootleg that I bought from a record fair a few years ago of Rob Halford performing with Black Sabbath. It's got the boardfeed from the November 15, 1992 show. Rob does some Ozzy and Dio era Sabbath material. There are also several soundboard recording of the Ozzy fronted Sabbath. I know this wasn't too helpful sorry but that's all I know about it.

Those are some floppy-ass titties

A quick poke around blogspot reveals several downloads for it, such as:

http://hardheavyold.blogspot.com/2008/0 ... riest.html