FMP
FMP Nickel Plated 9" Brass Overflow Tube For 1" Drain 102-1032
You will find that 791909-1 runs quietly, which is a plus in busy environments.
FMP Nickel Plated 7" Brass Overflow Tube For 1" Drain 102-1031
A nice touch is how the 1 inch by 2 inches by 1 inch size fits in the palm of your hand.