Hi! My husband and I are probably going to purchase a 2017 Ford Expedition EL XLT on Saturday. We've got an option of buying one with about 70,000 miles on it for $23,000, so that sounds like a good deal (right?). We have 3 children, with our fourth on the way in February. This Expedition will be the main family vehicle. Our kids are aged: 6 years, 3 years, 6 months and then a newborn in February, he and the 6 month old will be about 10 months apart. Our 6 year old still rides in a car seat, and I would dearly like to keep her in the car seat for at least 2 more years. Ideally, we would have the youngest two riders in the 2nd row, and the 6 and 3 year old in the 3rd row. However, the 3rd row only has one anchor for the top tether. I don't care about the lack of LATCH in the 3rd row, it truly doesn't matter to me, but the top tether is important. Is there a way to get a second tether retrofitted for the 3rd row? I need it to be safe, and if it's not possible, then I will put up with having 3 in a row in the 2nd row. Thanks for any advice.