re: Needing a list of Iron-nickel asteroids.
Hi All
This is the IAU's Minor Planet Centre...
http://cfa-www.harvard.edu/iau/lists/MPLists.html
...if you don't find such a list here then I'd say it doesn't exist. You might have to create it by trawlling through the various Journals and compiling it yourself - do it well and you'll get published as it would be useful.
Asteroids are pretty hard to classify off their spectra, but plenty have been so classified. Nickel-irons seem to be core fragments from large, differentiated asteroids that have since been mashed by collisions.
Why the interest?
Adam