Can someone point me to a product (preferably on Amazon) that's exactly like the sprayers in Thailand? One that can be screwed into a toilet's water supply, not a kitchen sink's.
As long as it says "bidet" and mentions the toilet and sells in the US, it'll have the connections for the toilet's water supply. Basically, these kind of bidets "man-in-the-middle" the water output from the wall to the toilet reservoir.
In my estimation water pressure seems to be higher in the US (maybe just because I'm in a big apartment and pressure is higher to compensate for altitude). What this means is that it will take some time to adjust to the.. um.. high pressure cleaning. Also beware that pressure cleaning yourself in the middle of january with near freezing water is an experience that will.. wake you up in the morning. It'll be awkward for the first week, but after then you'll be a pro.
EDIT: I think it's worth mentioning that the bidets in thailand tend to be kitchen sprayers. For a more ideal situation you want something with a more focused and narrow beam width, so to speak. The bidet I have is like that, but I haven't been able to find it on amazon after a quick search..
The kitchen sprayers work well for me because you can adjust the pressure by squeezing. The best situation would obviously be to have it hooked up to a heater water supply with the ability to adjust the heat (like a bath/shower). I was able to have this kind of setup rigged in our bathroom in China where it's not uncommon to have random pipes coming out of the walls.