Cannot use mobile pass on my old phone

I have paid for three  mobile global passes for seniors, one who is 80 years old. I am not travelling with the group, I sent details to the lead passenger and told him to download the app. The problem is that his Iphone 6 is running 12.5.7 and will no longer update so the app will not work and he cannot afford to buy a new phone. The first trip will be from Brussells to Jena in Germany on September 8th sometime in the day, I leave the UK tomorrow morning (Monday) but I cannot leave the group without a solution. Is there anyway of getting the a printed pass in time for thier trip and how do I do that? Please help