Lots of places. I did bring this tradition to my home from Thailand. I keep a small towel next to the toilet to dry myself, that I change every week or so.
The main downside is that modern toilets nowadays are wall mounted without any exposed pipes, which makes it impossible to install a bidet without making holes in the wall...
Replacement seats with built-in bidets are becoming more and more common, they just attach to the water line on the back of tank, they're very convenient.