I was just looking for blog material on the Web when I stumbled on this enterprise I had never heard about: the Erotica Boxing show. I found a promo video - which you can watch below, but not much else.
Some reference pages from the past (Floating World and Adult Industry News) indicates that was a show offered through PPV cable around 2004. The official site - www.eroticaboxing.com, is dead now.
The girls fought with braveness if not with technique. Trunks were optional. Some boxing ladies pictures show they were gorgeous too. I would bet they had come from the adult movie industry.