Any chiropractor also carries Standard Process Phosfood--same as Ultraphos that http:www.ultralifeinc.com sells. That's another option for you, and probably more expensive, but available.

Apple cider in the USA is just crushed, squeezed apples, and in order to sell it, it has to be pasteurized. It's probably strained. You might be able to put malic acid in apple juice. 1 teaspoon per quart. That's what softens up liver and gallbladder stones, unless they are calcified. If they are, get some chanca piedra and do that. http://www.Bulkfoods.com and http://www.nuts.com has malic acid.
Nobody really knows what the Coke does except it has orthophosphoric acid in it, too, like the Ultraphos and other stuff that helps the liver and relaxes smooth muscle tissue like the common bile duct so just about everything passes without getting stuck there. And settles the stomach. Been used for that for many years. I've never altered the program, but you might try grapefruit juice in place of the Classic or regular Coke and let us all know if it works for you. You can use peppermint candy or ginger tea to help with any nausea the flush drink causes.

Best of luck, Friend!

EDIT: I see that http://www.heritagestore.com has the cola syrup. You can go there and get some. Do some more reading on what helps. They have some good stuff that will help you. Actually, it's a new website for me that I didn't previously know about.