Thank you everyone for the interest!
To address On Point's concern:
I am not a business- I am a car enthusiast working out of his cramped garage to build up a few of these kits. This whole thing started after I wanted my 4R to have a certain function that it didn't from the factory. I had to do a bulk buy on wire and terminals plus I purchased a much better soldering iron than I already had to solder to the momentary switch. I was proud and figured it was a cool feature so people would possibly be interested.
I must say, I feel it is entitled to think that everything should be free. It takes roughly 20 minutes to build one of these up with electrical test (I do 100% electrical continuity with my Fluke multimeter). Add in shipping, paypal fees, the two switches, bulk wire, terminals, heat shrink along with the hours it took to figure this out on both a 4th and 5th gen plus write up instructions and you'll see I am not making a killing on these.
I am doing this as a fun little hobby to pay for random mods on my 4Runner. So far, I used the profits from the run of 4th gen parts to buy a HiLift and to do the rear diff mod. Next up, I want to get some 80/20 aluminum and build a roof rack.
OK now that that rant is over, regarding the pet proof switch- I do include a few extra feet of wire so you can relocate this around if you'd like, and I am happy to include a few additional feet in there as well. The recessed switch is a good idea, but i think the best option would be to go with a Mil Spec switch. In a past life, I was a sales engineer for an aerospace electronics company. We manufactured switches that had very high engagement forces that were used on the joystick of aircraft for fire controls.
These switches are not cheap in the least bit- roughly $30 each. I would be happy to incorporate one of these into the build and feel they would easily be pet proof. If anyone has any other switch ideas, please feel free to share.
I'd want something that could lock. Similar to a power tool like a table saw where you can keep kids etc from turning it on. Though ina vehicle you may/will lose that little pull out plastic "key", so maybe something like this would be good to keep pets (or sleeping people, or rather sleeping until they fall out) from bumping it
https://spemco.com/v1d2sw0b-aze00-0-carling-locking-rocker-on-off-orange-safety-lock/