As far as the books on this topic tell, Michele had to look after one of his children suffering from bad illness in the 90s, that explaing the break after "Dellamorte Dellamore".
You can get his movie "St. Francis" from No Shame, but I suppose you already know that. "Arrivederci amore, ciao" you can get for 1 buck in Germany, but no English subtitles, sorry.
Thanks to your post, I might be getting this one
. Also the Italian DVDs of his movies are quite cheap, but no English subs, as you already mentioned.