SK, I've attached a link to a site that has lots of simple, sensible information about the surgery we've all been through. It refers to cancer, but it relates to the diet that j pouch patients should follow. You can search the site for what you need. I hope you can access it. I don't know if I copied or pasted it correctly.
Another resource can be the hospital your surgeon and his team work from. Major hospitals usually have a dietician on-staff who will be familiar with ostomy / j pouch surgeries, especially if your surgeon works from there and specializes in this type of surgery. Call that department, tell them you are Dr. X's patient and ask for a diet sheet for ileo anastomosis patients. Or ask your surgeon's office for a food sheet. My surgeon specializes in this type of surgery and they were prepared with a thin binder of information (and j pouch pictures!) given to me a few weeks in advance. For anyone else preparing for this surgery, remember to ask your surgeon or his assistant, or the pre-admission nurse, for a diet sheet so you can prep your kitchen.