I use Accurite brand Thermo/Hygro combos. Many of the members of this forum do as well.
I get them from Walmart or Amazon for about $10 each. I have 2 in each of my enclosures.
For water bowls, I actually use plastic dog food bowls from Walmart. Less then a dollar a piece.
They are square and hollow underneath so double as a hide.
As for more "conventional" water bowls I unfortunately can't offer any suggestions.