That list in the other thread has the models with 3 full sets of LATCH and dedicated sets of lower LATCH anchors for the center, you're right. It's a good guide for you in that regard in terms of dedicated lower LATCH anchors in the center, but the vehicles that allow borrowing of outboard lower LATCH anchors to install in the center if the carseat manufacturer also allows it aren't all included on that list. Here's a quick stab at typing up a list from the LATCH manual by vehicle brand to narrow it down a bit more in terms of borrowing, with the caveat that certain vehicle brands only allow borrowing in certain specific models, and I'm just doing a quickie list by brand from the LATCH manual:
Certain specific Dodge/Chrysler/Jeep models allow borrowing if the carseat allows borrowing.
Some specific Ford, Lincoln and Mercury models through the 2008 model year, and all Fords starting with the 2009 model year, allow borrowing if the carseat manufacturer also allows it.
Some specific Mazda models also allow borrowing to do center LATCH installs if the carseat permits it.
The list of vehicle brands that don't allow borrowing is a longer one:
Acura, Audi, BMW, Daewoo, Honda, Hyundai, Infiniti, Isuzu, Jaguar, Kia, Land Rover, Lexus, Maserati, Mercedes, Mini, Mitsubishi, Nissan, Porsche, Saab, Scion, Subaru, Suzuki, Toyota, Volvo, VW and most other non-domestic brands do not allow borrowing and allow only use of dedicated sets of lower LATCH anchors.
GM doesn't allow borrowing anymore (GM used to but rescinded allowing it :thumbsdown
.