The 5.0kW (5-FLO) Flo-Thru heating element has been replaced by the 6-FLO 5.5KW element
The 6-FLO (5.5kW) and the 5-FLO (5.0kW) are vitually the same.
You can find the 6-FLO (5.5kW) element in the 'Related Products' section below.
(Ignore the 'higher kilowatt rating warming' on that page.)