I think the option of the elastic belt that adheres to either side of your bag is a good option..I am very picky about how mine fits, I have had only 2 leaks in 10 months, the hollister bag I mentioned in my previous post may work for him, with the belt I use, it holds it in place, I am never without it. If he would like to talk I would be glad to discuss it openly, can give you my cell number anytime,,,,,Gene