Mega rare is right!
My engine sat at a very reliable machine shop for 10 months for a rebuild with new sleeves and pistons and the parts could not be sourced.

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1999 E300 TD
1999 E300 TD, WVO conversion
2007 Jaguar XJ8
1993 190E 2.3, Limited Edition, 239,000 miles (sold)
1991 300 SL (sold)
1977 MGB
1969 TR6
1980 TR8
joturbe@comcast.net