Jarrow Formulas produces a Bifidophilus formula that would probably be a more specific strain to use with his colon.
I have a website for Biocranial practitioners that may help - http://www.biocranial.com,
otherwise asking at health food stores and massage centers for referrals may be next best.
I have a good reference book for you for Chinese medicine, but will have to remember to grab that at my office and forward it on to you later.