The 2002 book by Karl Olav Sandnes, Belly and Body in the Pauline Epistles, (Society for New Testament Studies Monograph Series, 120; Cambridge: Cambridge University Press, 2002), was reviewed in Review of Biblical Literature last december by H. H. Drake Williams III. You can read the review here.
The book contains a section on Philo on pp. 108-135: The belly in Philo's Writings. It is the thesis of the author that Paul is using a traditional idiom, a topos or a literary commonplace attested in ancient Graeco-Roman sources, and appropriated in Jewish sources as well. This view should not surprise readers of Philo, but Sandnes demonstrates that many interpretations in pauline research of the role of Paul's belly-statements have been far off the point.
The review is quite positive, though it finds that the investigation of Jewish sources is somewhat brief; "Belly and Body in the Pauline Epistles is a well-argued and informative volume on a neglected portion of Paul's writings. Sandnes's Greco-Roman contextual examination is extensive and thought-provoking. His study will be a help to others studying cultural backgrounds for methodology as well, though his attention to Paul's Jewish mind-set is underdeveloped. This volume will be of interest to anyone considering pauline ethics." And we might add; it will be profitable for philonic scholars to read too.