Here you go.
http://civilwarcauses.org/stat.htm
At the site there is a link to Univ. of VA website for 1860 census where you can check to see if the numbers are accurate.
Interesting link. But I don’t think it even brings up the number of blacks who owned slaves.
The third link in my reply to you has census info and stats showing the percentage of blacks who owned slaves.
Read it. I think it might interest you.