For what it is worth, I am going to find out tomorrow how much of the wiring is installed on the EX, and what all I need to buy to make this happen with OEM parts even though Honda told me very specifically not to do it when I asked.
If you are interested, everything seems to be there except for one wire and having to change over a couple plugs. So I am definitely going to move forward with this though finding the plugs and pins I need will probably be a headache.
But to frighten you off, OEM parts is going to be around $800. Meanwhile on Amazon you can get a nice set a pad that have been working fine in my truck for $60.
Trying things out. Ran most of the missing wires on my day off. So far with the AC control panel and AC control module from a Touring, everything still seems to be working as advertised so adding OEM heated seats is still a possibility. Need to run one wire and am waiting for the seat back heater pads to show up. The big hold up will most likely be finding the pin I need to connect the power wire to the fuse box and replacing that plug that I totally did not break. Also, I am quite a bit concerned how the fuse is 20 amps but the factory wiring is nowhere near large enough to handle that current. Wondering if the person who designed this has any idea what the purpose of a fuse is.
Well, I am trying to hide it and make it match the factory set up. Also, I am curious.
I actually found the factory plugs I need on AliExpress. Okay, pretty sure they are the correct ones. Will order and head to the local salvage yard sometime this week as apparently Honda has been using these plugs for a while.