I think TMO wants people to upgrade to the One Plus plan. That's why the international data pass is gone. That bad thing is the support page on TMO still makes it sound like you can purchase. I think TMO should fix it one way or the other. If it is truely no longer available, say so.
We can certainly pass the request along! Are you specifically wanting to be able to purchase before initiating travel? What rate plan are you on?
I'm on the Simple Choice plan. It will be nice to be able to purchase it one the phone app before or during travel.
We have used Google maps in about 13 foreign countries on the SC plan since it went into effect. Did have some problems when driving in Croatia off and on.
Only intl trip since T-One came along was to Cuba. Of course NO usable roaming - and we did no driving ourselves.
Side Note - Going w.o. cell or any kind of internet was a strange experience!!