Black Sabbath being hired to play a show for a weird satanic cult they turned down...

I can't seem to find anything about this but I remember hearing anecdoets about this a little while ago... does anyone have a go-to article on this? I'd be much obliged!

I've mentioned that story now and then. I think I originally read it in one of the many books I've read on 'em or magazine interviews. You can see it rehashed on the nets:

And I also see every band member wearing aluminum crosses. The story behind those? A satanic cult wanted Black Sabbath to play at Stonehenge. When they declined, the cult informed the band they placed a hex on them and Ozzy had his dad construct the crosses for the band to wear, 24 hours a day and 7 days a week.
http://www.volumesofsin.com/2012/02/dispelling-satanic-metal-of-70s-black.html

As Black Sabbath made news, a group of Satanists asked them to play at
their "night of Satan" at Stonehenge. They refused. The head witch of
England, Alec Sanders who was a regular fan of Sabbaths, informed them that
these Satanists had placed a hex on the band members. Ozzy asked his father
to make aluminum crosses, which he did, and then had them blessed. They
wore these crosses 24 hours a day for protection.

Read more: http://stason.org/TULARC/music-bands/ozzy-osbourne/1-5-How-did-Black-Sabbath-come-to-be-The-Osbournes.html#.UgHD5JLVDh4#ixzz2bFg9NJHJ