***It looks like the steering wheel controls from the newer Solara models will work. The button are silver, but fit the SE steering wheel perfectly***
Thanks to TcamSE07 for the information
For anyone that may have an SE and want to try this "mod"... the part number for the steering wheel controls with the DISP (with Bluetooth) button is:
AU Toyota: 84250-06200-B0 (cheapest I found brand new was like $175 not including shipping)
It is very hard to find brand new however. If you do not have the right hand bluetooth controls at all and just want to replace your blank right steering wheel cover with the DISP style,
AU Toyota: 84250-06190-B0 (much cheaper option and a little more availability at $60 USD from various places online)
I wound up searching Australian eBay for either a used set of switches or a used steering wheel which had the switches, the latter being what I found. I reached out to the australian members on here and had jeffbro reply and he wound up shipping the steering wheel pads (sans the steering wheel to reduce shipping costs). jeffbro was awesome to work with and he hooked me up, since NO sellers on AU australia want to ship from Australia to USA.
AND Finally I will say that anyone that wants to be a little more experimental than I...
If you take apart your RH switch, you will see on the circuit board, "DISP" is printed and pads to solder a push-button and a resistor to the US market part are there. So I am assuming, since they are easier to find and cost much less, you could just get an extra set of switches (even just the cheaper, non bluetooth, left side) and use it as a donor for the circuit parts needed. Then you'll just have to figure out a way to make the non-moving blank pad be able to either move, or use some other way to press the DISP soldered pad...
****The more I was thinking about it... knowing the circuit board is the same (minus the actual DISP button), is might be worth just buying the second part number above for the $60.. and then just using that as a donor to your factory switch. That would give you the circuit board parts PLUS the factory button. You could not use the LED from the board to light it up, as I noticed it is more of a dark green than the aqua color (if I remember my original LED color correctly, as I've changed it from aqua/green, to white, now blue.) PRETTY sure the AU color was different from USA factory color...****