The size of the inductor does not matter. Any other suitable High Q, low ESR inductor for the circuit can be used at the output port.
MAX2680
Production
The MAX2680/MAX2681/MAX2682 miniature, low-cost, low-noise downconverter mixers are designed for low-voltage operation and are ideal for use in portable...
Datasheet
MAX2680 on Analog.com
The size of the inductor does not matter. Any other suitable High Q, low ESR inductor for the circuit can be used at the output port.